The keyword is "sum" which tells you x, y, and z are being added. One half of the sum means that the sum of the three numbers is going to be divided by 2.
x + y + z
------------
2
Answer:
19 times t = how many toy cars Gordon has.
OR
19t= how many toy cars Gordon has
The graph looks accurate make sure you create a table of values and clearly dot the points at (0,-3) and (2,-3).
