As x increases and y stays constant, z as y increases and x stays constant, zas x increases and z stays constant, y

Consider

(1) As x increases and y stays constant, z ______

(2) As y increases and x stays constant, z _____

(3) As x increases and z stays constant, y ______

(1) As x increases and y stays constant, z increases

When y stays constant, z is directly proportional to x. So , as x increases the z also increases.

(2 ) As y increases and x stays constant, z decreases.

When x stays constant, z is inversely proportional to y. So , as y increases the z decreases.

(3) As x increases and z stays constant, y increases

(z stays constant)

So equation becomes

When z stays constant, y is directly proportional to x. So , as x increases the y also increases.

$450 is the answer.

step-by-step explanation:

30% of 450 = 135

450-135=315