Proportional vs Non-Proportional Graphs

What is the y-intercept for the following graph and is it proportional or non-proportional?

• Proportional, b=1
• Proportional, b=-2
• Non-proportional, m= -1
• Non-proportional, b=1

What is the y-intercept for the following graph and is it proportional or non-proportional?

• Proportional, b=0
• Proportional, m=0
• Non-proportional, b=1
• Non-proportional, b=0

Which graph is proportional?

• A
• B
• C and D
• All of the graphs are proportional

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

Which graph is non-proportional?

• A
• B
• C
• D

What is the constant of proportionality?

• 8
• 16
• 24
• 2

Is this is a function or not a function?

• Function
• Not a Function

Is this a function or not a function?

• Function
• Not a Function

Which set of ordered pairs is a function?

• {(9,5), (10,5), (9,-5), (10,-5)}

• {(3,4), (4,-3), (7,4), (3, 8)}

• {(6,-5), (7, -3), (8, -1), (9, 1)}

• {(2, -2), (5, 9), (5, -7), (1, 4)}

Is the relation a function? Why.

• Yes, because the x-value 11 has two y-values pair with it.
• Yes, because each x-value has only one y-value paired with it.
• No, because the x-value 11 has two y-values pair with it.
• No, because each x-value has only one y-value paired with it.