I think the answer is 21 you just multiply the number of weightlifters by the number of places so 7 x 3.
Ok so
1/4 of total eaten
3/4 left
3/5 of 3/4 eaten
9/20 left
18=9/20 of whole
multiply both sides by 20
360=9 of whole
divide both sides by 9
40=whole
40 total originlly
Yes you are correct welcome
the y-intercept is where it crosses the y-axis so you are only looking at where it crosses