question reads: the cost of priniting the school yearbook is $11,000 for 200 copies or $24,500 for 500 copies. If the printing cost is a linear function of the number of copies printed, find the cost of printing 800 copies. show all steps used to solve.
2006-11-02 13:23:06 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
Let x be the number of yearbooks, let y be the cost.
Then y = mx + b, where m is the slope and b is the y-intercept.
To get the slope, use m = (y2-y1) / (x2-x1)
= (24500 - 11000) / (500 - 200) = 13500 / 300 = 45.
To get b, plug in either value of x and the corresponding value of y:
11000 = 45(200) + b, so b = 11000 - 9000 = 2000.
Therefore the linear function is y = 45x + 2000.
2006-11-02 13:29:34 · answer #1 · answered by James L 5 · 0⤊ 0⤋
500 + 500 =1000 minus the 200 = 800.
So if it costs 24,500 for 500 it would be 24,500 + 24,500 minus the price of the 200 (11,000). So 24,500 +24,500 - 11,000 = 38,000 for 800 yearbooks. Get it, hope that helps, I'm a teacher
2006-11-02 13:42:03 · answer #2 · answered by christina m 2 · 0⤊ 0⤋
dont yell at me if its wrong. my guess is $36,8000
2006-11-02 13:27:29 · answer #3 · answered by Anonymous · 0⤊ 0⤋