I need help on this plzzz I and not the best at math ​

See attachment for graph

Step-by-step explanation:

Given

Required

The graph of the step function

Before plotting the graph, it should be noted that:

and use closed circle at its end

and use open circle at its end

So, we have:

The line stops at -1 with an open circle      

The line starts at - 1 and stops at -1 with a closed circle at both ends

The line starts at 1 with an open circle

The options are not complete, so I will plot the graph myself.

See attachment for graph

3; 9 is 8 to -4

step-by-step explanation: