Question

if y is directly proportional to (x+y)² and y =32.4 when x =4 calculate the value of x when y = to 169​

Answer 1

Answer:

By definition of proportionality,

If y is directly proportional to x,

y α x

∴y=Kx .......Equation 1

where K is constant of proprtionality

Now,

Given that x=2,y=4

putting the above values in Equation 1 we get,

4=K×2

∴K=2