For part A it would be 11 3/8 ( I did the math fam ) for part b it would be y = 1 5/8x, you just substitute the x for 7 and you’d get the answer from part a, For part C you would just say that you multiplied the 1 5/8 rate by 7 to get the total amount of weight lost within that week
Now I’ll take that brainliest fam, lmk if it was right