Write a liner function f with the values f (0) = 3 and f (2) = 8

Answer 1

that's the same as two points (0,3) and (2,8)

A line through them has slope (8-3)/(2-0) = 5/2 = m

plug that and either point into the slope intercept formula for a line

y=mx + b

3=(5/2)(0) + b

b= 3

the equation is

y=(5/2)x + 3 or

2y = 5x + 6 or

2y-5x = 6

Answer 2

Use two-point form

(y - 3) / (x - 0) = (8 - 3) / (2 - 0)