Functions where y varies directly with x — direct variation equations — follow a specific format.
y= mx
In this form, m≠0. We can substitute the x- and y-values from the known point, ( 32, -9), into this equation to determine the constant of variation, m.
Now that we have the constant of variation, we can write the function.
y= - 6x
With this equation, we can find any value of x or y when we are given the other. In this case, we are looking for y when x=1.
