# (Maths) Can someone help please??

#1
X is proprtional to the square root of y where y >0
Y is increased by 44%
Work out the percentage increase in x
1
1 year ago
#2
(Original post by Akhtee3)
X is proportional to the square root of y where y >0
Y is increased by 44%
Work out the percentage increase in x
There a few different ways of working this out.
1) x is proportional to the square root of y. So, if y doubles, x increases by . So an increase in y of 44% leads to an increase in x of , or 20%.

2) (A bit more formal) X is proportional to square root of y, so . Rearranging for the constant, k:
.
This constant is the same for all x and y. Let and be the original values and and be the new values, where .

The fraction is the number of times bigger is than .

. Therefore a 20% increase.

3) You could pick actual numbers and see what happens.
Last edited by bvipulananthan; 1 year ago
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