How do you find the important points to graph #f (x) = -3x + 8#?
1 Answer
Apr 5, 2018
The first thing to note is that this is a polynomial of degree 1. Hence this is a straight line. The points that are of important for sketching any straight line are the intercepts.
To find the x-intercept (where the curve "cuts" the x-axis), we solve for
That is,
Then,
To find the y-intercept (where the graph cuts the y-axis), we let
That is,
So we have the points