The line on the position time graph show the velocites of different vehicles which line represents a vehicle moving at constant velocity

For some mysterious reason, we can't see the graph.

On a position/time graph, constant velocity is represented by a straight line.  Depending on the velocity, the line may be sloping up, sloping down, or horizontal.  The only thing the line on the graph CAN't be is vertical.

c. 7/3

step-by-step explanation:

a rational number is like pi- it is a repeating decimal.

a. is -1.8

b. 2.236068

c. 2.3333333333333333333

d.   is 3

i hope that ! =)

b.a device that inputs heat into a cool object