Answer:
theres no question????????????
well first u would have to find 7 and add of times 7X
Keep 6/15 the same and change Division sign into a multiplication sign and flip 4/21 and that will become 21/4.

126/60=21/10 and 21/10 as a mixed number is 2 1/10 so your answer is 2 1/10. Hoped I helped. :)
I think it would be the first one because the y intercept is 8 and to find the gradient u do rise/run