Question

Use the image to answer the question. The graph illustrates how much Amanda makes watching her little cousins. Using the graph, predict how much Amanda will make if she watches them for seven hours. (1 point) Responses $110 $110 $75 $75 $105 $105 $70

Answer 1

Amanda will make $75, if she watches them for seven hours

How to find the prediction

The equation graphed is written in the slope intercept form s below

y = mx + c

where

m = slope

x = intercept

The slope, m is calculated using the points on the graph (1, 15) and (3, 35)

m = (y₀ - y₁) / (x₀ - x₁)

m = (15 - 35) / (1 - 3)

m = (-20) / (-2)

m = 10

c = y intercept, from the graph

c = 5

The equation of the line is y = 10x + 5

For x = 7

y = 10 (7) + 5

y = 75