The cost, c, of materials for a deck varies jointly with the width w and the length l. if c = $470.40 when w = 12 and l = 16, find the cost when w = 10 and l = 25.

i can't solve unless i know what the line is

step-by-step explanation:

welcome to/p>

f(x) is   are being squared

g(x) is   increasing by 2

h(x) is adding .25 each time

k(x) is taking the square root

f(x) and k(x) are exponential functions