Answer:
1) 3 2) y=73x
Step-by-step explanation:
For number 1):
(y2-y1)/(x2-x1)= (-4-[-1])/(-2-[-1])= (-3)/(-1) = 3
For number 2):
Speed=miles/hour= miles per hour
Speed= 146 miles/2 hours= 73 miles per hour
