Question

Question is in picture below ​

Answer 1

`(y - 18)/(x - 1) = (23 - 18)/(1.5 - 1) = (5)/(0.5) = 10 \\ y - 18 = 10(x - 1) = 10x - 10 \\ y = 10x + 18 - 10 = 10x + 8 \\ \boxed{f(x) = 10x + 8}`

A. is the right answer.

hope this helps.