# Is the graph of a circle a function?

Yes, the graph of a circle is a function. Recall, in a circle,
that x2 + y2 = r2, for circles at the origin, *though you could
offset it any place you want by making the equation more
complex.* Solving for y, you get y = square root(r2 - x2). Since
square root, by definition, has two values, the plus value and the
minus value, this is a function, even though each x has two values
for y, within the domain of +/-R.

Some people might say that the graph of a circle is not a function, because it violates the single value test, i.e. if you draw a vertical line within the domain of the function, you get more than one value. In fact, however, if you convert the equation from cartesian coordinates to polar coordinates, you pass the single value test, i.e. R is constant for every theta.

### What is a circle graph?

It's a circle that kind of looks like a pizza cut into pieces. Usually, the pieces are labeled as something (usually you compare things with a circle graph) and normally have percents along with the label. I'm sorry, I explained it the best way I could. If you have any questions, please e-mail me. To learn more about a circle graph; Also known as pie graph, check this out! http://www.fedstats.gov/kids/mapstats/sconcepts_pie.html < Copy and paste into…

### How is the function differentiable in graph?

If the graph of the function is a continuous line then the function is differentiable. Also if the graph suddenly make a deviation at any point then the function is not differentiable at that point . The slope of a tangent at any point of the graph gives the derivative of the function at that point.

### How can you tell the difference graph or function?

A function describes the relationship between two or more variables. A graph is a kind of visual representation of one or more function. A line or curve seen on a graph is called the graph of a function. * * * * * For any point in the domain, a function can map to only ine point in the range or codomain. In simpler terms, it means that (for a two dimensional graph), a vertical…

### Does a graph of a circle represent a graph of a function?

Although closely related problems in discrete geometry had been studied earlier, e.g. by Scott (1970) and Jamison (1984), the problem of determining the slope number of a graph was introduced byWade & Chu (1994), who showed that the slope number of an n-vertex complete graph Kn is exactly n. A drawing with this slope number may be formed by placing the vertices of the graph on a regular polygon. As Keszegh, Pach & Pálvölgyi (2011)…