Answer: the slope of green line = 
Step-by-step explanation:
We know that,
If two lines are parallel then their slopes(rate of change of y with respect to x) are equal.
Given: The red line and the green line are parallel.
The slope of red line = 
Then, the slope of green line =
[Slopes of two parallel lines are equal]
Hence, the slope of green line = 
What exactly are u solving for c or h?
They represent the two times the football is on the ground.
You need more information than that to solve for x and y. However, it is possible for you to graph the equation and see what all the possible values for x and y can be. A possible coordinate can be x=3 and y=3.
Answer:
C
Step-by-step explanation: