Answer:
B
Step-by-step explanation:
You see that the question mentions MPH. An hour is 60 minutes, so you would look at the 60 minutes on the base of the graph. If you go directly up to where the diagonal (dark) line perfectly crosses a point of the grid (that's any corner of any square on this grid) and look directly to the left (which represents the MPH) you see the number 3. If you go even higher, you see 6 MPH.
The 3 miles at 60 minutes represents 3 MPH, which is Tanisha's speed.
The 6 miles at 60 represents 6 MPH, which must be Albert's speed.
Since 6 is two times bigger than 3, the correct answer is B) Albert is running two times faster than Tanisha is walking.
