Find the constant of variation k.
-y varies directly as x. When x is 16, y is 20.
A) $k = 320$
B) $k = \frac { 16 } { 5 }$
C) $k = \frac { 5 } { 4 }$
D) $k = 80$

Question

Find the constant of variation k.
-y varies directly as x. When x is 16, y is 20. 
A) $k = 320$
B) $k = \frac { 16 } { 5 }$
C) $k = \frac { 5 } { 4 }$
D) $k = 80$

Quizplus · Accepted Answer

The constant of variation $k$ is found using the formula $y = kx$. Substituting $x = 16$ and $y = 20$, we get $20 = 16k$, which simplifies to $k = \frac{20}{16} = \frac{5}{4}$.

Find the Constant of Variation K k=320k = 320k=320 B) k=165k = \frac { 16 } { 5 }k=516​

Find the Constant of Variation K $k = 320$ B) $k = \frac { 16 } { 5 }$