The linear function graphed below represents brendas monthly cell phone bill based on the number of hours she uses. what is her hourly rate?

a. $12 per hour
b. $15 per hour
c. $27 per hour
d. $39 per hour

The answer will be A, 12.

Step-by-step explanation:

When you use the slope formula, and substitute all of the correct values in, you will get to a final answer of 12.

Hope this helps, and have a great day!

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18