Practice!

Sample Problem

Complete the table of values for the direct variation model y=kx2 where k=1/3 (round your answers to the nearest integer)

 

x

3

6

9

12

15

18

21

y=kx2

Solution

The direct variation model with k=1/3 gives y=(1/3)x2.

y=(1/3)32=3

y=(1/3)62=12

y=(1/3)92=27

y=(1/3)122=48

y=(1/3)152=75

y=(1/3)182=108

y=(1/3)212=147