Question 948301
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(x^-1) = -x/2 + 2}}}
:
It's a one to one function if a horizontal line passes thru the the graph at only one point
:
{{{ graph( 300, 200, -6, 5, -10, 10, -2x+4, 3) }}}