Directions: Complete problems below. Show all work. Make sure to include labels and complete sentences, as necessary.

Reflection question: When a situation can be modeled by a linear equation, what information do you need in order to find an equation?

1) The table below show the weekly cost of running a website:

weeks (x) Cost (y)

5 $29

12 $57

20 $89

a. Calculate the slope of this line and explain in a complete sentence what it means for this exercise.

b. Find the y-intercept and explain I'm a complete sentence what it means for this exercise.

c. Write an equation for the cost (y) in the form y=mx+b.

Complete the sentence(s) with as much detail as you can:

d. The variable x represents the ...

e. The variable y represents the ...