Finding the Rate of Change and the Initial Value Represented in Graphs, Tables, and Equations

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

• x

• y

• 1/2

• 2

Is the relationship proportional or non-proportional?

• Proportional

• Non-Proportional

Which of the following represents direct variation?

• y = kx

• y = k/x

• y = x/k

• y = mx + b

Is this a direct variation?
y=2x

• yes

• no

What ordered pair does a direct variation always go through when graphed?

• (0, 0)

• (1, 0)

• (0, 1)

• (1, 1)

Is the relationship in the table a direct variation?

• Yes

• No

Is the relationship in the table a direct variation?

• Yes

• No

Determine if there is a constant of proportionality, k.

If there is a k, what is it?

• There is no k

• k = 8

What is the equation for the given relationship in the table?

Does the graph show a direct variation?

• Yes

• No