Question 203701
Remember  direct  variation  has  the  form,,,y = kx
.
1) 20 = 4k,,,,,k=5,,,,,y=5x
.
2) 30 = 3k,,,,,k=10,,,,,y=10x
.
3) .7 = .4k,,,,k=1.75,,,,,y=1.75x
.