select the equations that show a proportional relationship between x and y. y = 3x y = 9x

Explanation:

Step1: Recall the form of a proportional relationship

A proportional relationship between (x) and (y) has the form (y = kx), where (k) is a non - zero constant (the constant of proportionality).

Step2: Analyze (y = 3x)

Here, (k = 3) (a non - zero constant). So (y) is proportional to (x) since it follows the (y=kx) form.

Step3: Analyze (y = 9x)

Here, (k = 9) (a non - zero constant). So (y) is proportional to (x) since it follows the (y = kx) form.

Answer:

The equations (y = 3x) and (y = 9x) show a proportional relationship between (x) and (y).