FUNCTIONS PRACTICE <3

Is this a function?

• Yes

• No

Answer explanation

No X values repeat! They each have only one output! I CANNOT STRESS ENOUGH THAT THE Y's DO. NOT. MATTER!!!

Tags

CCSS.8.F.A.1

Is this a function?

• Yes

• No

Answer explanation

The X value '1' has 3 outputs!! If this were graphed, these points would stack on one another! This all means that it is NOT a function :)

Tags

CCSS.8.F.A.1

Is this a function?

• Yes

• No

Answer explanation

Only one corresponding Y value/Output for each X value :)

Tags

CCSS.8.F.A.1

{(4, -1), (3,-2), (2, 1) , (1, -2)}

Does this set of ordered pairs represent a function?

(Remember, an ordered pair is (X value, Y value) <3 )

• No

• Yes

Answer explanation

The X values are 4, 3, 2, and 1. Nothing repeats! They all have exactly one output :)

Tags

CCSS.8.F.A.1

Is this a function?

• No

• Yes

Answer explanation

Points stack, meaning X values repeat!

Is this a function?

• Yes

• No

Answer explanation

All different X values - none repeat!

AGAIN Y DOESN'T MATTER! THE Y VALUES CAN ALL BE THE SAME AND IT WON'T CHANGE ANYTHING!!!

(I must stress this since so many people got tricked by this when we learned it. I wanna make sure the same doesn't happen to you <3 )

Tags

CCSS.8.F.A.1

Is this a function?

(Slight curveball here. This is to remind you that Input just means X and Output just means Y.)

• Yes

• No

Answer explanation

Input is the same as X. In this case, all the inputs, or X values, are variables. That's the only difference. But,s you can see, none of these repeat. So, it is still a function :)

Tags

CCSS.8.F.A.1

Is this a function?

• No

• Yes

Answer explanation

X values repeat :)

Tags

CCSS.8.F.A.1

Is this a function?

• Yes

• No

Answer explanation

Points stack, meaning x values repeat

Draw a line that (If graphed) would represent a function

Answer explanation

As long as NO POINTS STACK ON ONE ANOTHER you have yourself a function graph :)