If y varies directly with x, and the constant of variation is k = 5, find y when x = 40.
Hint
y = 5x
Answer
y = 200
If y varies directly with x, and the constant of variation is k = ⅓, find y when x = 45.
y = 15
If y varies directly with x, and y = 64 when x = 8, find y when x = 12.
64 = k(8)
y = 96
If y varies directly with x, and y = 72 when x = 6, find y when x = 2.
72 = k(6)
y = 24
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