Answer:
2
Step-by-step explanation:
To find the slope, we use the equation
m = (y2-y1)/(x2-x1)
Since the have the points (2,-4) and (4,0)
m = (0--4)/ (4-2)
= (0+4)/(4-2)
= 4/2
=2
speed of R miles per hour
miles depends on time
thats why it's miler per hour
