Question

Y is directly proportional to x², x=2 and y = 20, value of x when y= 1.25 is?

Answer 1

value of x is 0.5.....

y=kx square
20= (k)(2 square)
k=5

so....
y =kx square
1.25=5 X square
x square = 1.25/5 = 0.25

:- x= 0.5