Question

Hillary and Sarah went shopping over the weekend to purchase new shirts.

The equation below represents the total amount of money Hillary spent on x shirts.



The graph below represents the total amount of money Sarah spent on x shirts.



Who paid the cheaper price per shirt?
A.
There is not enough information to determine the price per shirt.
B.
Hillary paid the cheaper price per shirt.
C.
Sarah and Hillary paid the same price per shirt.
D.
Sarah paid the cheaper price per shirt.

Answer 1

I can't see the equation or the graph you mention. Please paste the equation for Hillary and either describe the graph (two clear points) or upload the image.

How to decide once I have them:
- Hillary: if her total is written as y = m x + b, then m is her price per shirt.
- Sarah: the price per shirt is the slope of the graphed line. Pick two points (x1,y1) and (x2,y2) and compute slope = (y2 − y1)/(x2 − x1).
- Compare the two slopes: the smaller slope = cheaper price per shirt; equal slopes = same price.

If you give the equation and two points from the graph (or the image), I’ll compute and pick A–D for you.