Question

Brianna wants to buy a digital camera for a photography class. One store offers the camera for $50 down and a payment plan of $20 per month. The payment plan for a second store is described by y 15x + 80, where y is the total cost in dollars and x is the number of months. Which camera is cheaper when the camera is paid off in 12 months? Explain.

Answer 1

The second camera. The second camera is $30 cheaper than the first camera.

Explanation:

The equation of the first store is y = 20x + 50. Keep this in mind.

Replace x with 12 in each of these equations to determine which is cheaper.

y = 20(12) + 50 = $290

y = 15(12) + 80 = $260

So the second store is cheaper.