Question

The sales of a sandwich store increased approx. linearly from $52,000 to $116,000 during the first five yrs of business. Write an equation that models the sales y after x years. Determine what the sales will be at the end of 12 years if the pattern continues.

Answer 1

For a linear function (straight line) we need 2 data, the text gives us these.
What is the data we are looking for?
1. A point on the line
2. Slope of the line

At the begging of the business (x=0) the sandwich store made 52,000$ (y=52000)
So we have the point (0, 52000)

Can you try and figure out the slope?