The trend line passes through (10,9) and (35,0). Write an equation for the trend line.
Answer: Solution :
Step 1 :
Make a scatter plot of Lily’s running data.
Step 2 :
To draw a trend line, use a straight edge to draw a line that has about the same number of points above and below it. Ignore any outliers.
Step 3 :
Find the slope of the trend line.
The line passes through points (2, 20) and (4.5, 45).
Use the slope formula.
m = (y2 - y1) / (x2 - x1)
Substitute x1, = 2, y1 = 20, x2 = 4, and y2 = 45.
m = (45 - 20) / (4.5 - 2)
m = 25 / 2.5
m = 10
Step 4 :
Find the y-intercept of the trend line.
Slope-intercept form equation of a line :
y = mx + b
Plug y = 20, m = 10 and x = 2.
20 = 10 · 2 + b
20 = 20 + b
Subtract 20 from both sides.
0 = b
Step 5 :
Use your slope and y-intercept values to write the equation.
Slope-intercept form equation of a line :
y = 10x + 0
So, the equation for the trend line is
y = 10x
Example 2 :
David records the number of chapters and the total number of pages for several books as given below.
No. of chapters
3
4
5
8
10
11
15
17
19
No. of pages
20
44
50
95
90
130
125
170
160
Step-by-step explanation:
A . expression A
B . expression B
C . expression C
D . expression D
ill mark u brainliest if u answer !
Answer:
answer choice B.
Step-by-step explanation:
explain why 1/12 + 1/2= 7/12
Answer:
1/12 + 1/2 = 1/12 + 6/12 - 1+6/12 = 7/12
Step-by-step explanation:
hope this makes sense
Step-by-step explanation:
1/2 of 12/12 is 6/12.
So, this means: 1/12 + 1/2 = 7/12
is
1/12 + 6/12 = 7/12
You are making curtains for your little sister's dollhouse. There are 24 windows on the dollhouse and each
needs 3.75 inches of fabric for curtains. How much fabric will you need?
(please help I only have a couple of minutes)
Answer:
90 inches
Step-by-step explanation:
24 x 3.75 which is the same as 24 x 3 3/4 which is the same as
24 x 15/4 = 6 x 15 = 90
Which of the following quantities are to the left of zero on a number line? Select three that apply.
A The opposite of 7
B The opposite of -9
С
3
D
-4
m
Answer:
A, D, and E
Step-by-step explanation:
because they are negative
4х +7
у+ 1
Зу — 11
12x – 1
Jenny makes bottle cap necklaces for the Bottle Cap Boutique. Each necklace has 6 small bottle caps on it. If she has 2,520 bottle caps, how many necklaces can she make?
Answer:
420
Step-by-step explanation:
What is the volume of this figure?
Answer:
875 ft^3
Step-by-step explanation:
Pick them apart starting at the bottom. The formul used is V=lwh
Starting at the bottom we have we have a sqare of 5 ft = 5ft^3= V = 125 ft^3
Then we have a rectangular prism: 5 x 5 x 20 = V = 500 ft^3
Third we have 5 x 5 x 10 = V = 250 ft3
125+500+250 = 875 ft^3
Which data set could be represented by the box plot shown below?
Answer:
b
Step-by-step explanation:
i gussed
Jack and beth are selling wrapping paper for a school fundraiser. Customers can buy rolls of plain wrapping paper and rolls of shiny wrapping paper. Jack sold 5 rolls of plain and 8 rolls of shiny for a total of $190. Beth sold of 5 rolls plain and 3 shiny for a total of $90. Find the cost of each roll of wrapping paper
Answer:
Cost of a roll of plain wrapping paper = $6
Cost of a roll of shiny wrapping paper = $20
Step-by-step explanation:
Let [tex]x[/tex] denotes cost of a roll of plain wrapping paper and [tex]y[/tex] denotes cost of roll of shiny wrapping paper.
Jack sold 5 rolls of plain and 8 rolls of shiny for a total of $190.
[tex]5x+8y=190\,\,\,(i)[/tex]
Beth sold of 5 rolls plain and 3 shiny for a total of $90.
[tex]5x+3y=90\,\,\,(ii)[/tex]
Subtract (ii) from (i).
[tex]8y-3y=190-90\\5y=100\\y=20[/tex]
Put [tex]y=20[/tex] in (ii)
[tex]5x+3(20)=90\\5x+60=90\\5x=90-60\\5x=30\\x=6[/tex]
Therefore,
Cost of a roll of plain wrapping paper = $6
Cost of a roll of shiny wrapping paper = $20
Mia's dog, Chulo, weighs 13.8 pounds. How many ounces does her dog weigh?
Answer:
220.8 ounces
Chulo weighs 220.8 ounces
Which table represents a function?
Group of answer choices
Answer: The answer is C
Step-by-step explanation: If you look at the x’s it is the only one that doesn’t have x’s repeated
x + y = 5.90
2x + 4y = 16.80
Nancy has 1/3 of a cup of strawberries. She wants to share them with her 4 friends. How much will each of her friends get?
8th grade math! If you know the answer to this problem please interact(:
Answer:
the third one (-2,1)
Step-by-step explanation:
Answer:
C
Step-by-step explanation:
so solving the first one we get
y=2x+5
and the second one we get
y=5x+10+1
y=5x+11
substiuting we get
2x+5=5x+11
3x=-6
x=-2
and y= 1
so it would be C
if my answer helps please mark as brainliest.
FIRST CORRECT ANSWER GETS BRANLIEST !!!!!!!!
Answer:
4 - 1 = 3
10 - 6 = 4
Step-by-step explanation:
can you help me solve the linear equation algebraically y=-x-3. y=-2x-8
Answer:
I can't it's to hard try studying
7(x-2)=28 Can somebody help me and show the steps?
Can someone plz help
Answer:
it should be 1/4
Step-by-step explanation:
Answer:
1/4 because it depends on how many times you flip it
If the measure of AngleB is 40°, what measures can AngleA and AngleC be? Select the three correct answers. 20° and 30° 30° and 110° 55° and 85° 60° and 90° 70° and 70°
Answer:
30° and 110°
55° and 85°
70°and 70°
Step-by-step explanation:
Given that :
Angle B = 40°
Sum of angles in a triangle :
Angle (A + B + C) = 180°
A + 40 + B = 180
A + C = 180 - 40
A + C = 140°
From the Given options ;
The sun of the Angles Given must add up to 140°
Hence,
30° and 110° = 140°
55° and 85° = 140°
70°and 70° = 140
SOMEONE HELP ME PLEASE ASAP AND SHOW THE WORK I WILL MAKE YOU BRAINLIEST AND GIVE YOU A GOOD RATE!!!!! SOMEONE HELP ASAPPPPPPPPPPPPPP!!!!!!!!!!!!!
Answer:
5x+10=30
Step-by-step explanation:
sorry, it does not have any works/steps in forming this equation.
Solving equation(if needed):
5x+10=30
5x=20
x=4
Answer: you can count by fives 5,10 15,20,25,30
Step-by-step explanation:
The equation y+ 3 = 5(x - 3) represents a linear function. What is the y intercept of the equation?
Answer:
-18
Step-by-step explanation:
If you're looking for the y-intercept for this equation this means that x = 0.
So substitute x as 0 in the equation and you'll get the following.
y + 3 = 5 (0 - 3)
y + 3 = -15
y = -18
The temperature dropped 20 degrees from noon to midnight. The temperature at midnight was 24°F. Write and solve an equation to find the temperature at noon?
solve the equation t8/t2 = _____
Answer:
[tex]t^{6}[/tex]
Step-by-step explanation:
I am going to assume exponents for this question.
[tex]\frac{t^{8}}{t^{2}}[/tex]
When dividing exponents with the same base, it is simply subtraction, so 8 - 2 = 6 which produces the answer.
Which equation does the graph below represent?
A coordinate grid is shown. The x axis values are from negative 5 to positive 5 in increments of 1 for each grid line, and the y axis values are from negative 20 to positive 20 in increments of 4 for each grid line. A line is shown passing through the ordered pairs negative 4, 16 and 0, 0 and 4, negative 16.
y = fraction 1 over 4x
y = 4x
y = fraction negative 1 over 4x
y = −4x
Answer:
The answer is D!! Trust me I have took this quiz and got it right.
Step-by-step explanation:
Have a good time on your test!
Answer:
The answer is B! trust me
Step-by-step explanation:
Find the surface area of the figure shown. The surface area of the figure is
5.1 ft
4 ft
2 ft
8.2 ft
Evaluate the exponential function
f(x) = 3x ; x = -2
Answer:
-6
Step-by-step explanation:
Plug (-2) in for X in the equation
3(-2)
-6
Was hit with a hard one. Can someone explain this to me please?
Answer:
Step-by-step explanation:
Write an inequality for the graph below.
'न
34
10
।। 12 13 14
Answer:
i like cheese wbu hahahahahaha
Simplify the expression 6w + + 3w.
Answer:
9w
Step-by-step explanation:
they have the same terms so you can add them together. 6+3=9 and keep the term (w)
therefore 6x+3w=9w
Answer:
9w
add the numbers if he variables are the same
therefore you add 6 and 3 to get 9
Hope this helped!
