Which transformations of ƒ(x) = 3x does h(x) = -3x - 7 represent?
reflection over the y-axis and shifted 7 units down
reflection over the x-axis and shifted 7 units down
reflection over the y-axis and shifted 7 units up
reflection over the x-axis and dilation by a factor of 3

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.