Predicting Values
Using the two equations we created for direct and inverse variation, we can predict values of y given certain values of x.
For example, suppose we have the equation y = 5x. If we want to know the value of y if x = 3 then all we need to do is substitute 3 in for x in the equation y = 5x.
y = 5x
y = 5(3)
y = 15
and want to know the value of y for x = 2, we follow the same procedure and substitute 2 in for x into the equation .
