Yefim S. answered • 07/10/20

Math Tutor with Experience

Let we have linear function C = kn + m, C is cost, n is cost of 1 table. We have two points (11, 1140) and (25, 1560). So k = (1560 - 1140)/(25 - 11) = $30 per table.

Now C = 30n + m, m = C - 30n = 1140 - 30·11 = 810. So C = 30n + 810.

If C = 1590, then 150 = 30n + 810. n = (1590 - 810)/30 = 26 tables.