## Does circle represent a function?

A circle is a curve. It can be generated by functions, but it’s not a function itself. Something to careful about is that defining a circle with a relation from x to y is NOT a function as there is multiple points with a given x-value, but it can be defined with a function parametrically.

**What function makes a circle?**

We know that the general equation for a circle is ( x – h )^2 + ( y – k )^2 = r^2, where ( h, k ) is the center and r is the radius.

**How do you graph a circle function?**

Center away from the origin

- Locate the center of the circle from the equation (h, v). Place the center of the circle at (3, –1).
- Calculate the radius by solving for r.
- Plot the radius points on the coordinate plane.
- Connect the dots to the graph of the circle with a round, smooth curve.

### Is a semi circle a function?

Semicircles are functions. Consider a circle with the equation x2 + y2 = r2.

**Is a half circle a function?**

Function defined by a relation in the form f(x) = √r2–x2 or f(x) = − √r2–x2 where r is the radius of a circle centered on the origin point.

**What are the real life representations of a circle?**

Some of the real-world examples of circles are: The wheel of a bicycle. Coin. Dinner plate.

## Which graph is a function?

If a vertical line is moved across the graph and, at any time, touches the graph at only one point, then the graph is a function. If the vertical line touches the graph at more than one point, then the graph is not a function.

**Is a circle an even or odd function?**

Rule1:-Odd functions are always symmetrical with respect to the origin. and even function is symmetrical with respect to y axis. hence,standard equation of circle is always even, it never be odd.

**Why is a semi circle a function?**

The only “unit semicircles” that can be expressed as y=f(x) are the upper half of the unit circle and the lower half (any other half circle fails the “vertical line test”, so it cannot be expressed as an explicit function of x).

### What are the different ways of representing functions?

We can represent different types of functions in different ways. Usually, functions are represented using formulas or graphs. There are four ways for the representation of a function as given below: Word description is used in this way of representation of a function.

**Is the area of a circle a function of its radius?**

Any area measure A is given by the formula A = πr2. Because areas and radii are positive numbers, there is exactly one solution: √A π. So the area of a circle is a one-to-one function of the circle’s radius. Is a balance a function of the bank account number? Is a bank account number a function of the balance?

**How to understand the representation of a function graph?**

This way of representation is very easy to understand. The input values are marked along the x-axis. For any input value, the corresponding output value is the vertical displacement from the x-axis. For e.g. at x = a, the output is equal to f (a). The graph shows the properties of the functions. For e.g. from figure 2, we can directly tell:

## What is the definition of a circle?

A circle can be defined as the locus of all points that satisfy the equations x = r cos(t) y = r sin(t) where x,y are the coordinates of any point on the circle, r is the radius of the