you have to add all of the together so like graph number 1 add all those numbers together and then divide by how much numbers there are and that is the median
F(x) = (1/2)x + 4 Plug y in for f(x). y = (1/2)x + 4 Swap x and y. x = (1/2)y + 4 Solve the equation for y =. Subtract 4 from both sides. x - 4 = (1/2)y Multiply each term 2. 2x - 8 = y Plug f^-1(x) in for y. f^-1(x) = 2x - 8
