I need help I don't understand

Question

Answer 1

(a) well her total pay depends on the hours, so dependent=pay, independent = hours

(b)

h p

1 6

2 12

3 18

4 24

5 30

(c) p = 6h

(d) p = 126, so 6h = 126, so h = 126/6 = 21. So 21 hours