Draw the graph of f(x) =  + 13x − 20 in the window [0, 10] by [−20, 30]. Algebraically det...

Draw the graph of f(x) =  + 13x − 20 in the window [0, 10] by [−20, 30]. Algebraically determine the coordinates of the inflection point. Zoom in and zoom out to convince yourself that there are no relative extreme points anywhere.