Proportional Graphs Equations

Use the table to write an equation that relates lunch cost L and number of riders n.

• L = $0.50n

• L = $4.00n

• L = $6.00n

• L = $8.00n

The graph shows the cost of grapes when purchased by the pound.

What is the cost for 1 pound of grapes?

• $0.70

• $1.25

• $2.00

• $1.50

What makes a graph proportional?

• Straight line

• The line goes through the origin

• Curvy line

• Straight line and the line goes through the origin

What is the unit rate for the rain fall?

• 2 cm per hour

• 1 cm per hour

• ¹/₂ cm per hour

• 4 cm per hour

What is the ordered pair that represents the unit rate?

• (1, 15)

• (15, 1)

• (4, 60)

Is the graph proportional or non proportional?

• proportional

• non proportional

• both

• neither

What is the equation of the line?

• y = 20x

• y = x + 20

• y = 2x

• y = x + 2

You earn $18 for every hour you work. Which equation represents this function?

• y=(18/2)x + 0

• y = 18x

• y = 2x + 18

• y = 18x + 2

Using the graph above, determine the constant of proportionality.

• k = 0

• k = 1

• k = 3

• k = 6

Using the table above, determine which statement is correct.

• The table is proportional and the unit rate is 100.

• The table is not proportional because the unit rate is not constant.

• The table is not proportional because it doesn't pass through the origin.

• The table is proportional and the unit rate is 0.01.