1) For the data in the table, does y vary directly with x? If it does, write an equation for the direct variation. x y
10 15
16 24
20 30

a) yes; y=1.5x
b) yes; y=2x
c) yes; y=x+5
d) y does not vary directly with x

2) Same as above.

x y
16 4
32 16
48 36

a) yes; y=2x
b) yes; y=4x
c) yes; y=8x
d) no; y does not vary directly with x

Thank you!