Question

Write an equation expressing inverse variation for each exercise below.

1. y varies inversely as x, and y = 25 when x = 3

2. y varies inversely as x, and y = 7 when x = 12

Answer 1

\(\Huge y\alpha \frac {1}{x}\)
y=\(\Huge\frac{k}{x}\) where k is constant
25=\(\Huge \frac {k}{3}\)
k=75
so it is y=\(\Huge \frac{75}{x}\)

try the 2nd part urself