The general function form for inverse variation is y= kx, where k is the constant of variation and k cannot equal 0.
y=- 16/x
Practice makes perfect
We are told x and y vary inversely. Knowing this, we want to write a function that models this inverse variation. Let's recall the general function form for inverse variation.
y=k/xIn this formula k is the constant of variation and it cannot equal 0. To find its value we will substitute the given values, x=2 and y=- 8, into the formula.
