Question

Does Y Vary Directly with X If So What Is The Equation For The Direct Variation
X: 1 4 7
Y: 3 6 9

Answer 1

Answer:

No Y and X do not vary directly.

Step-by-step explanation:

The equation for  direct variation is $\frac{y}{x}=k$

This means $\frac{y}{x}=k$, the ratio of y and x must be a constant.

In the given values:

for y = 3, x = 1

$\frac{3}{1}=3$

for y = 6, x = 4

$\frac{6}{4}=1.5$

for y = 9, x = 7

$\frac{9}{7}=1.28$

Since the ratio of y and x values is not a constant, there is no direct variation in the equation.