Suppose the domain of a function $j(x)$ is the interval $[-5,4]$, and the range of $j(x)$ is the interval $[-2,5]$. Determine the domain and range of the following functions. Write your answers using interval notation.

a) $j\left(\dfrac{1}{5} x\right)$
Domain:
Range:

b) $\frac{1}{5}j(10 x)$
Domain:
Range:

Hint: