10 POINTS...MATH...INVERSE FUNCTIONS.....read.... :)?

Question

Says:

Determine the inverse functions for the functions below. Begin by switching varaiables in the original function, then solving for the 'new' y. For each case sketch the function and its inverse.

Have no idea what this is or what to do. Please explain how u found answer. 10 Points! :)

3. y= (2/3)x - 4

What is the inverse fuction for this and what in the invariant?

Answer 1

y= (2/3)x - 4

interchange the roles of x and y

x=2/3y-4

then solve for the new y

2/3y=x+4

simplify y, it will become

y=3/2x+6

Answer 2

y= (2/3)x - 4



x = 3(y-4)/2

interchange x and y

y = 3(x-4)/2 is required inverse function

find more here

http://www.purplemath.com/modules/invrsf...