y is directly proportional to the square of x .When x:10,y:20. Find the value of y when x:6

Question

please solve

Answer 1

Hi Shaina,

 

The relationship that we are given is that y = k * x^2, where k is any number. Given the first test case:

 

20 = k * 10^2

 

0.2 = k

 

To find y when x = 6:

 

y = 0.2 * 6^2 = 0.2 * 36 = 7.2

 

Hope this helps!