Question

A company finds it can produce 25 heaters for $ 6100​, while producing 30 heaters costs $ 7200. Express the​ cost, y, as a linear function of the number of​ heaters, x.
y=

Answer 1

5 additional heaters cost $1100 ... $220 per heater ... this is the slope

y = 220 x + b

plug in one of the points to find b