Direct Variation Graphs Equations Slope and Tables

In the equation y = 14x, what is the constant of proportionality?

• y

• x

• 14

What is the constant of proportionality?

• $3

• No COP

• $2

• $9

Is this table proportional?

• Yes

• No

The constant of proportionality in the equation y = ½x is _______. 

• x

• y

• 1/2

• 2

Write the direct variation equation for the table given.

• y = 1/3x

• y = 3x

• y = 1/2x

Choose all of the true statements about the graph:

• The relationship shown is directly proportional.

• The slope is 3.

• The graph includes the point (4, 12)

• When you double the x value, the y value doubles.

One of these tables represents a proportional relationship.

Table _____ represents a proportional relationship. The equation is ____ = ___ ___

• Table A, y = 1.6x

• Table A, y = 0.625x

• Table B, y = 1.5x

• Table B, y = 2/3x

Is this graph proportional?

• Yes

• No

Is this table proportional?

• Yes

• No

Write an equation for this relationship.

• y = 18x

• y = 18.50x

• y = 22.50x

• There is no COP.