Proportion (Cambridge (CIE) O Level Maths): Exam Questions

$y$ is inversely proportional to the square root of $x$.
When $y=7$, $x=2.25$.  

Write $y$ in terms of $x$.  

$y=$................................................

$p$ is directly proportional to ${\left(q+2\right)}^2$.
When $q=1$, $p=1$.  

Find $p$ when $q=10$.  

$p=$ .................................................

$y$ is directly proportional to ${(x-1)}^2$ .
When $x=5,y=4$.

Find $y$ when $x=7$.

$y=$ ..............................................

$y$ is inversely proportional to the square root of $x$.

Given that $y=7.5$ when $x=9$, find $y$ when $x=25$.
 

$y=$..............................................

$y$ is directly proportional to the cube root of $\left(x+3\right)$.
When $x=5,y=\frac{2}{3}$.  

Find $y$ when $x=24$.  

$y=$................................................

$t$ is inversely proportional to the square of $(x+1)$. When $x=2$, $t=5$. Write $t$ in terms of $x$.

$t$ = ...................................................

When $t=1.8$, find the positive value of $x$.

$x$ = ...................................................

$y$ is inversely proportional to the square of $(x+1)$.
$y=0.875$ when $x=1$.

Find $y$ when $x=4$.  

$y$ = ....................................................