Question

How do you use a graphing calculator to find the limit of `xabs(x-4)` as x approaches -1?

Answer 1

-5

Explanation:

Use your calculator (or other graphing software/app) to plot the graph, then look to see what happens at `x=-1`

graph{x|x-4| [-10, 10, -5, 5]}

In this case, If `f(x)= x|x-4|`, then as `f(x)` is continuous, the limit is `f(-1)=-5`