Z is inversely proportional to A and if Z=225 when A = 15 find an equation connecting Z and A and the value of A when Z = 75

equation connecting them: Z = k 1/A

k being the constant

225 = K * 1/15

K * 1/15 = 225 (flip to solve more easily)

k = 3375

Z = k * 1/A

75 = 3375 * 1/A

75 = 3375/A

A = 45

y = 5x + 17

step-by-step explanation:

a perpendicular line will be the opposite reciprocal slope of the given equation.   the slope given is -1/5 so the opposite reciprocal is 5

find b:

7 = 5 (-2) + b

7 = -10 + b

17 = b

write equation

y = 5x + 17