I'm pretty sure that it would be 1,000...
Step-by-step explanation:

to find the slope for the first one, use the formula 
(It's the slope formula)
so... 
then plug in... 
this line has a slope of 0
As for the miles problem, to find mph, the miles have to be at 1.
so... 
therefore, he drove 60.5 mph
13: 72.25
14: 52
For 14, you need to split the figure into a triangle and rectangle.
Answer:
Coordinates for B= (10,-2)
Step-by-step explanation:
The solution is shown in the image provided step by step, as it was not possible typing it on this given space here. Hope it helps :)