evan is running a marathon. He wants to caculate his average speed between two checkppints. He reaches the 3- mile checkpoint after 0.75 hour and the 18- mile checkpoint after 2 hours what is evans average speed, in miles per hour between the two checkpoints

Aretha wanted to gather data about the cost of local bowling leagues in her area. she plotted the data and determined that the average bowling league costs consist of a one-time registration fee and a monthly fee modeled by the equation y = 15x + 20. identify and interpret the y-intercept in this model. the y-intercept is 20. this is the cost per month. the y-intercept is 20. this is the cost of registration. the y-intercept is 15. this is the cost of registration. the y-intercept is 15. this is the cost per month.