y varies directly as x. If y = 28 when x = 7, what is the constant of variation?
Note
For direct variation, y = kx. Substitute the given values: 28 = k × 7. Therefore k = 28 ÷ 7 = 4.
y varies directly as x. If y = 28 when x = 7, what is the constant of variation?
For direct variation, y = kx. Substitute the given values: 28 = k × 7. Therefore k = 28 ÷ 7 = 4.