Question

Determine whether y varies directly with r.
Y = 12r
y = ?

Answer 1

Yes, y varies directly with r.

Step-by-step explanation:

In order to determine whether y varies directly with r, we need to check if the equation y = 12r represents a direct variation. In a direct variation, the ratio between y and r is constant. Let's check this by rewriting the equation in the form y = kx, where k is the constant of variation.

When we rewrite y = 12r as y = 12 * 1r, we can see that the ratio between y and r is always 12. Therefore, y varies directly with r.