Question

Mr. Simon landscapes new houses for a building contractor. He charges by the square meter of yard space plus a setup fee. He billed the contractor $2,150 for a 400-square- meter yard and $1,650 for a 300-square-meter yard. Write an equation in the form
y = mx + b that can be used to find the cost, y, to landscape any amount of yard space, x.\

Answer 1

400m+b = 2150
300m+b = 1650
subtract to get
100m = 500
m = 5
so, b = 150

y = 5x+150