Question

if y varies directly with x, and y=12 when x=3. Find y when x=13

Answer 1

Answer: y = 52
Explanation:
13/3=4 1/3
4 1/3 times 12 = 52

Ratio explanation
(Times 4 1/3) 12:3 (divided by 4 1/3
New Ratio- 52:13