Answer:
10.
Divide b into thirds, and then add together 2 of those thirds.
15/3 = 5
5x2 is 10.
Sorry if that doesn't make sense but it's how I do it in my head lol.
Answer:
a
it' is a negative function since is going from top to bottom, the 1/2 represent the slope and it it going one down and two to the side, and the -2 is your y-intercept