**Question 4:**

The diagram shows part of the straight line graph obtained by plotting $\frac{y}{x}$ against $\sqrt{x}$.

Given its original non-linear equation is $y=px+q{x}^{\frac{3}{2}}$. Calculate the values of *p* and *q*.

Solution:

**Question 5:**

The diagram below shows the graph of the straight line that is related by the equation $\frac{x}{y}=\frac{2}{x}+3x$.

Find the values of *p* and *k*.*Solution:*