What is the slope of a line that is perpendicular to the line shown on the graph? −2
-1/2
1/2
2

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie

Aman is 6 feet 3 inches tall. the top of his shadow touches a fire hydrant that is 13 feet 6 inches away. what is the angle of elevation from the base of the fire hydrant to the top of the man's head?

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?