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Y is directly proportional to x squared if y=20 when x=2 find y when x= 5

1 Answer

4 votes

Answer:

y = 125

Explanation:

Given that,

y is directly proportional to x² i.e.


y=kx^2

k is a constant of proportionality

Put y = 20 and x = 2 in the given equation to find k.


k=(y)/(x^2)\\\\k=(20)/((2)^2)\\\\k=5

Now put k = 5 and x = 5 in the given equation to find y.


y=5* (5)^2\\\\y=125

So, the value of y is equal to 125.

User Andrey Borisov
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