What is the slope-intercept form for (1,6) and (2,5)

Which math sentence can be used to determine if the triangle is a right triangle?

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. what distance from city a is the point where the truck and the car will meet?

Lana's family entered a 5-kilometer race lana's average step length is about 0.5 meter how many steps will she need to take the finish