Write a function f (x) that represents (-2,1) (1,8)

Y = 4x + 1 is an equation that represents a function. When you input values for x ... f (x) = 4x + 1, find f (2). You read this problem like this: "given f of x equals 4x plus one, find f of 2 ... output of 9. f (x) = 4x + 1. f (2) = 4 (2) + 1 = 8 + 1 = 9.