To start off, 5/25 is 1/5. 25 and 5 can both be divided by 5, thus it is 1/5 smiplified. Now you add 12 and it is 12 and 1/5.
So the X coordinate is 4, and the Y is -5. The rule says X + 2, Y - 8 so (4) + 2, (-5) - 8.
It's D (6, -13)
To buy 3 books Kaitlyn will need $27
Y = 2x - 3
Y = 2(2) - 3
Y = 4 - 3
Y = 1.
The y value or y coordinate is 1.