Question

1) Mathew had 4 kilograms of potatoes. He

peeled 3 kilograms of them in 1 hour. Now he
has 1 kilogram of potatoes left. The graph
below shows Mathew's situation.
a) Find the slope of the line.
b) How long will it take Mathew to peel all his
potatoes?

Answer 1

a) Slope = 1 hour / 3 kilogram = 20 minutes per kilogram.

b) 20 minutes x 4 kilograms = 1 hour and 20 minutes total