Terra has been working on the time it takes her to run a mile. She recorded the time it takes her to run a mile in the table shown below, where x represents the number of months since she started recording her time, and y represents the time it takes Terra to run a mile, in seconds.
table
0 1 2 3 4 5
610 600 590 580 570 560
Interpret the y-intercept.
A.
It took Terra 610 seconds to run a mile when she started recording her time.
B.
It took Terra 640 seconds to run a mile when she started recording her time.
C.
It took Terra 560 seconds to run a mile when she started recording her time.
D.
It took Terra 620 seconds to run a mile when she started recording her time.