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In $11-19,$ write the equation of each circle.Graph cannot copy

$(x-1)^{2}+(y+1)^{2}=9$

Algebra

Chapter 4

RELATIONS AND FUNCTIONS

Section 9

Circles

An Introduction to Geometry

Functions

Linear Functions

Polynomials

Oregon State University

Harvey Mudd College

University of Michigan - Ann Arbor

Idaho State University

Lectures

01:32

In mathematics, the absolu…

01:11

00:56

In $11-19,$ write the equa…

02:24

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02:17

01:41

03:12

Write the equation of each…

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and this question was asked to write the equation of this circle pictured. So the equation of a circle the center radius form is X minus. H squared plus y minus. K squared equals R squared. HK is the center of the circle, so we will be the center of the circle. We see that it is located at one negative one. I have highlighted an example of a radius in the circle and we can see that the radius is three units. Again. The center is your HK in the formula, so we'll do those substitution X minus one. It's weird plus y minus negative one which is the same thing as a white plus one squared in the Radius three squared, which is nine.

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