Answer: 5(11)+120=175
Explanation: In this equation you are trying to find slope. They are giving you the equation and they are giving you x. Using this graph you can tell that time (months) is on the x-axis and the Average nightly customers is on the y-axis, so you can take the number of months given in the problem (11) and plug it into the equation y=5x+120. this would give you y=5(11)+120. Plugging that into your calculator, the answer would be 175. Hope this helped!
