SOLUTION: Someone please could help me with it? Find the inverse function of f(x)= -2x + 4. Tell me if that function is one on one function.

Algebra ->  Functions -> SOLUTION: Someone please could help me with it? Find the inverse function of f(x)= -2x + 4. Tell me if that function is one on one function.      Log On


   

Question 948301: Someone please could help me with it?
Find the inverse function of f(x)= -2x + 4. Tell me if that function is one on one function.
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
Find the inverse function of f(x)= -2x + 4.
f(x) = y
y = -2x + 4
swap x and y solve for y
-2y + 4 = x
-2y = x - 4
y = x/-2 - 4/-2
The inverse function:
f%28x%5E-1%29+=+-x%2F2+%2B+2
:
It's a one to one function if a horizontal line passes thru the the graph at only one point
:
+graph%28+300%2C+200%2C+-6%2C+5%2C+-10%2C+10%2C+-2x%2B4%2C+3%29+