Question

Y

is directly proportional to
x
2
.
If
y
=
20
when
x
=
2
find
x
when y=45

Answer 1

x=4.5

Explanation:

so when y=20 and x=2, y is 10 times x so, 45/10=4.5

Answer 2

3

Explanation:

i said by accident but hegarty says it's right