I believe the answer to this is correct and i believe he did this by adding(i think)
Answer:
1.2
Step-by-step explanation:
=
= 1.2
Since the graph is a linear function, we're going to use the slope formula solve this:
Note I am replacing m with k

Inserting 2 points from the graph, let's use (1,8) and (2,16).

k=8