Adding up the whole hours first is 5+6+4 = 15. Adding the fractions is 1/2 + 3/4 + 1/2 is 1 3/4
This is 16 3/4 (answer c)
It depends how big the 16 cookies are going to be
The relationships are not proportional.
One of the lines, as x increases, y increases
Another, when x increases, y decreases.