help please. . Suppose you went to a carnival. The price to get in was $8, and you paid $0.50 to get on each ride. If you went to the carnival and rode 9 rides, how much did you spend? (1 point) $4.50 $17.50 $12.50 $13

Answer:$12.50Step-by-step explanation:The price to get in was $8, and you paid $0.50 to get on each ride.8 is the fixed price, 0.50 is the cost per rideWe use equation y=mx+bWhere m is the slope, x be the number of ridesy represents the amount spend and b is the fixed priceSo equation becomes y = 0.50x + 8you went to the carnival and rode 9 ridesPlug in 9 for x  and find out y the amount spendy = 0.50(9) + 8y= 4.50 + 8= 12.50you spend $12.50