Question

The charge for a ride in a taxi is proportional to the distance traveled. The cost for a
1
2
-mile ride is $6.00. Which equation correctly relates x, the distance in miles, to y, the charge in dollars?

Answer 1

Because y is proportional to x, y = kx. With y = 6 when x = 1/2, k = 6 ÷ (1/2) = 12. So the equation is y = 12x.