Question

If x varies directly with y and x = 2.5 when y = 10, find x when y = 16. 1.5 8 7.5 4

Answer 1

X=4

Hope this helps....

Answer 2

Answer: x = 4

Explanation:

From the question, we were told that x varies directly as y. This means that: x = ay

where the constant is a.

Then, we solve for a

x = ay

Divide both side by y

a = x/y

When x = 2.5 when y = 10, a will be:

a = x/y

a = 2.5/10

= 0.25

To find x when y= 16

Recall that x = ay

x = 0.25 × 16

x = 4