Question

y varies inversely with x, and x = -18 when y = 6. Find the inverse variation equation and use it to find the value of y when x = 12.

Answer 1

y=k/x will be the general inverse variation equation

x=-18 -> y=6

6=k/-18 -> k=6*-18 -> k=-108

y=k/x now lets solve it for x=12

y=-108/12
y=-9