Which position time graph represents an object that is moving westward at a constant velocity

A runner in a marathon passes the 7-mile mark at 1 o'clock and the 21-mile mark at 3 o'clock. What is the runner's average speed during this time period? mph

A particular rabbit accelerates from rest to a speed of 11.7 m/s in 1.2 seconds. What is the rabbit's average acceleration during that time interval? (Assume the acceleration is positive in our coordinate system, and give your answer in m/s2 .)

The table below shows data (position or velocity) for 8 different objects. Let west be the positive direction & east be the negative direction. Based on the data, determine whether each object SPED UP THE ENTIRE TIME, SLOWED DOWN THE ENTIRE TIME, or TRAVELED AT A CONSTANT VELOCITY. For each scenario (sped up, slowed down, & constant velocity) choose all that apply. Elapsed Time Velocity Velocity Velocity Velocity Velocity Velocity Velocity Velocity of object of object of object of object of object of object of object of object 1 2 3 4 6. 7 8 (s) (mm/s) (km/h) (m/s) (ft/min) (in/s) (mi/h) (in/min) (ft/s) -91 -81 -82 79 -88 84 17 72 1 -77 -84 69 -86 84 17 75 -91 2 -91 -73 -86 59 -84 84 17 78 3 -91 -69 -88 49 -82 84 17 81 4 -91 -65 -90 39 -80 84 17 84 Sped up Slowed down Constant velocity