C3 Unit 2A Review Sheet 1. The graph shows the amount James and
Olivia earn each hour at work.
90
James' Earnings Olivia's Earnings
81
72
63
54
Earnings ($)
45
36
27
18
9
1 2 3 4 5 6 7 8 9 10 %
Hours
a. State the rate of change for each function.
Label your answers ($_per_ _.).
Olivia:
James:

12m

step-by-step explanation:

square root means have of a number so have of 3 is 1.5 then multiply it by 8 and you get your answer!

c. y = 1/4 x + 5

step-by-step explanation:

first, put the equation of the line on the graph into slope-intercept form

(y = mx + b):   y = -4x + 8

second, a perpendicular line has to have "an opposite/reciprocal slope" to the original slope. so, find the "m" value in your original equation (it's -4, right? )

original slope: m = -4   perpendicular slope: change the sign to its opposite and find the reciprocal ("flip" the number)

new slope is now positive (b/c the original slope was negative 4), and it's 1/4 (not the original slope of 4 or 4/1)

make sure you have version 2.50

try looking in the very back of the book : )

step-by-step explanation:

you can download it here