Answer:

Step-by-step explanation:
Given
Represent the months with x and the earnings with y.
So:


Required
Determine the linear function
First, calculate slope (m)




The equation is then calculated using:




As a function, we have:

It's simple multiplication
Answer:it is 16
Step-by-step explanation:
Answer:
x = 5
Step-by-step explanation:
4x = 1x + 15
subtract 1x from both sides
3x = 15
divide 3 from both sides
x = 5