CAN SOMEONE PLS HELP ME THIS IS DUE TODAY PLS HELP

Write an equation for the function that includes the points (2,100)and (3,100)

Acar started driving from city a to city b, distance between which is 620 miles, at a rate of 60 mph. two hours later a truck left city b and started moving towards city a at a rate of 40 mph. how many hours after the truck's departure will the two meet?

What is the slope of the line that contains the points (-2,1) and (0,-3)