Sketch Scatterplots
Sketch a scatterplot with positive correlation.
How many people purchased a hotdog with water?
62
How many women participated in the survey?
30
Solve:
2x+4y=10
x+y=3
(1,2)
2(x-5)-1=-11
x=0
Sketch a scatterplot with a negative correlation
What fraction of people purchased pizza and soda?
120/400
How many more men than women prefer sports?
4
Solve:
y=2x+1
2x+2y=8
(1,3)
Solve for x:
3(x-4)-5=-14
x=1
Sketch a scatterplot with no correlation.
What was the most common purchase combination?
Pizza and Soda
What fraction of women prefer movies?
8/30
Solve:
-3x+2y=5
3x+4y=1
(-1,1)
Solve: -3(x+2)=-2x+1
x=-7
Sketch a scatterplot that clearly shows a relationship that is non-linear
What fraction of people who ordered a soda also ordered a hotdog?
50/200 or 1/4.
What percent of men prefer movies?
40%
y=2x-1
y=-3x-1
(0,-1)
Solve:
-2(x+4)+4x=4(x+8)
x=-20
What percent of people that ordered a soda also ordered pizza?
60%
What percent of people that prefer sports are women?
37.5%
-4x-5y=7
3x-3y=15
(2,-3)
Solve:
-3(x-4)+5=-2(x+6)-x
No Solution