What is the minimum number of data points needed to use matrices to find an equation for a circle in the form 0=x^2+y^2+Dx+Ey+F0 = x 2 + y 2 + D x + E y + F?

The number of rows of a matrix is the number of data points of the matrix.

The number of data points is 3.

The equation is given as:

The number of unknown is the minimum number of data points.

From the equation, we have:

The number of unknown variable is 3

Hence, the number of data points is 3.

Read more about data points and matrices at:

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Step-by-step explanation:

You need at least 3 points to define a circle.  By looking at the equation, you can see there are three unknown coefficients: D, E, and F.  Therefore, you must solve 3 equations, so you need 3 points.

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step-by-step explanation: