Find the measure of ∠ d if ∠ a = 5 2 x + 16 ∠ b = 7 2 x + 20 ∠ c = 3 2 x + 68 ∠ d = 3 2 x + 40

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.