If y varies directly with x and y = 1 when x = 15, how do you find x when y = 8?
1 Answer
Oct 19, 2015
Explanation:
The equation for direct variation is y =kx where k represents the constant of variation.
When y = 1 and x = 15 the equation would translate to
1 = k(15)
To solve for k algebraically, divide by 15 on both sides of the equation.
This solves to
To determine x when y = 8
The equation becomes
Multiply by 15 on both sides of the equation in order to isolate x