The slope of a vertical line is zero. true or false

Mustafa contributes 11% of his $67,200 annual salary to his 401k plan. what is his pretax income

You earn a 12% commission for every car you sell. how much is your commission if you sell a $23,000 car?

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.