How do you graph #f(x)=2x+1# and then use the horizontal test to determine whether the inverse of f is a function?
1 Answer
Feb 20, 2018
Find your intercepts, connect and continue in each direction, draw a horizontal line through various points of the graph and make sure it never intersects more than once.
Explanation:
Find the x and y intercepts of
y-intercept:
Plot these two points on the graph, connect them, and continue in each direction.
graph{2x+1 [-7.9, 7.9, -3.95, 3.95]}
For the inverse of f(x) to be a function, a horizontal line drawn through the graph of
Here, we can see that would certainly apply.
Thus, the inverse of