Question

King Street Deli and Pineview Foods both sell pasta salad by the pound.
This equation describes the cost in dollars, y, of x pounds of pasta salad at King Street Deli: y=5.29x
This graph shows the cost of pasta salad at Pineview Foods: It starts at (1, 5) and then (2, 10), (3, 15), and so on.
Which store charges less per pound for pasta salad? King Street Deli or Pineview Food?
How much less does that store charge?

Answer 1

Pineview Foods charges less.
King Street: $5.29 per pound.
Pineview: slope = (10−5)/(2−1) = $5.00 per pound.
Difference = $5.29 − $5.00 = $0.29 per pound.