Needed quickly! step functions graphing (see image below)

Step-by-step explanation:

Graphing a step function is the same as graphing any piecewise function. We simply graph each part of it separately. When dealing with a step function, this results in these steps to graph the function:

Draw a horizontal line segment at each constant output value over the interval of input values that it corresponds to.

Draw a closed circle point (a filled in circle) at the included endpoint on each horizontal line.

Draw an open circle point (a circle not filled in) at the endpoint that is not included on each horizontal line.

step-by-step explanation:

∆abc has the points a(1, 7), b(-2, 2), and c(4, 2) as its vertices. formed with the point d(1, 2) as its third vertex, then ∆abd is triangle.