Constant Proportionality in Graphs

In order for a graph to represent a direct variation the line must be straight and go through the _________.

• y-axis

• origin

• x-axis

• 1st quadrant

Determine the direct variation .

• y=x

• y=3x

• y=6x

• y=8x

Determine the direction variation.

• y=1x

• y=4x

• y=8x

• y-2x

Determine the direct variation.

• y=21x

• y=3x

• y=7x

• y=asdf

Determine the direct variation.

• y=9x

• y=10x

• y=90x

• y=10/9

Write an equation for this situation.

• y=9.75x

• y=19x

• y=19.25x

• y=9.5x

Write an equation for this relationship.

• y=18x

• y=18.50x

• y=22.50x

• y=22x

Which graph is proportional?

• A

• B

• None of the graphs

• All of the graphs are proportional

Is the given table a proportional relationship? If so, what is the constant of proportionality?

• Yes; 1/3

• Yes; 3

• Yes; 5

• No

Which of the tables above represents a proportional relationship?

• a & c

• a, b & c

• a, c & d

• all of them