Functions or Not a Function and Direct Variation and Proportional and Not Proportional

Is this table a function or not a function? 

• Function

• Not a Function

Is this table a function or not a function? 

• Function

• Not a Function

Is this graph a function or not a function? 

• Function

• Not a Function

Is this graph a function or not a function? 

• Function 

• Not a Function 

Is this table a function or not a function? 

• Function

• Not a Function

Is this graph a function and how can you tell?

• Yes its a function cause it doesn't cross itself

• No it's not a function because it goes through the origin

• No it's not a function because it touches the vertical line test more than once

• No it's not a function because it does not touch the vertical line test more than once

Is this mapping a function and how can you tell?

• Yes its a function cause all the numbers have lines

• No it's not a function because there a 5 in both ovals

• No it's not a function because the x value 5 has y values of  2 & 9

• No it's not a function because the y value 5 has x values of  2 & 9

Which best describes the equation?
y = 75x

• Proportional

• Non-proportional

Which best describes this equation?
y= 3.75x + 2

• Proportional 

• Non-proportional

Proportional or Non-Proportional:
The video game rental fee is $15 plus $3 per day. 

• Proportional

• Non-Proportional