Is the following relation a function?

Question

anonymous · Answer

Give the relation?

anonymous · Answer

attachment

anonymous · Answer

@seehearcreate 
@Harsha19111999

marissalovescats · Answer

No it is a circle. 

It does not pass the vertical line test

anonymous · Answer

That's a unit circle, and since the domain and range is not restricted, it is not a function.

marissalovescats · Answer

Take a pencil and keep it vertical

Move it across the graph, if it touches the graph in more places than one than it's not a function. 

Which here it does because it's a circle.

marissalovescats · Answer

@seehearcreate 

This is not a unit circle. Its just a regular circle with a radius of 1.

anonymous · Answer

Can u help with some more on a different question? @marissalovescats

marissalovescats · Answer

Yeah sure

geerky42 · Answer

@marissalovescats  Circle with a radius of 1 is called unit circle because it's what unit circle is.

marissalovescats · Answer

No one's ever taught me that, cool to know. 

I thought she was talking about the actual unit circle

anonymous · Answer

Haha yeah. Unit circles deal with points of sin, cos, tan and their inverses..

marissalovescats · Answer

Well I know that lol

Just didn't know cirlcles with radius of 1 were called a unit circle