x-intercept/s: This is where the graph touches the x-axis. For that to happen, y must be equal to zero. So, you have to solve for x and make the expression equal to 0
-->The x-intercept is at point (-2,0)
y-intercept/s: This is where your graph touches the y-axis. Here x must be the one equal to zero.
--> The y-intercept is at point (0,4)
critical value/s: For a rational function, this is where the value of the denominator is zero making the whole expression undefined. --> This is a line where the graph breaks.
Plot these points and some more using values of x near the left and right of the critical value.
The graph of is below:
