Linear Relationships from Graphs

What is the rate of change for the following graph?

• 80

• 20

• 40

• 160

Which graph shows a proportional relationship between x and y?

• F

• G

• H

• J

What is the constant of proportionality between the number of pages read and the number of hours spent reading?

• 45 pages per hour

• 90 pages per hour

• 135 pages per hour

• 270 pages per hour

If a line was drawn through the points, why would this line show a proportional relationship?

• It is not curved

• It is a vertical line

• It connects all the dots

• It goes through the origin

Which equation matches the graph?

• y = 1/3x + 3

• y = 3x

• y = x +3

• y = 3x + 3

What can you use to represent linear relationships?

• verbal descriptions

• equations

• graphs

• tables

• all of the above

Which line shows a proportional relationship between x and y?

• Line L

• Line M

Does this graph represent a proportional relationship?  

• No, because it doesn't pass through the origin.

• Yes, because it doesn't pass through the origin.

• Yes, because it intersects the y axis.

• No, because it intersects the x axis.

Which best describes the graph represented in this table?

•  proportional

• non-proportional

Which graph is proportional?

• A

• B

• C and D

• All of the graphs are proportional