Question

A farmer has 60 bales of hay stored in his barn. He feeds his cows 4 bales each day. Which graph represents the number of bales in the barn, y, after feeding his cows for x days?

Answer 1

What you must do for this case is find a function that suits the problem and graph it.
 We have:
 y: the number of bales in the barn
 x: days feeding his cows.
 y = -4x + 60
 see graphic attached.