Explanation
to solve this do, y=f(x), then put the values for x and you will obtain y
example:
[tex]\begin{gathered} y=f(x)=x^2+2x-8 \\ \text{when x = -10} \\ y=f(-10)=(-10)^2+2(-10)-8 \\ y=f(-10)=100-20-8 \\ y=72 \\ \text{then,when x= -10, y = 72, there you have a coordinate} \\ (-10,72) \end{gathered}[/tex]
do this, numbers from -10 to 10, then mark each coordinate in the plane, and finally draw a line connecting the points.
