The circle
determine the equation of a circle with a center at (4,0) what is the equation of a circle with a center at (4,0)
that passes through the point (-2, 1) by following the that passes through the point (-2, 1)?
steps below
x2 + (y + 4) = 5
1. use the distance formula to determine the radius:
o = (x2-x1)? +(
c (x - 1)2 + (y + 2)2 = 5
c (x + 4)2 + y2=5
2. substitute the known values into the standard form:
(x-h)2 + (y - k) = r2
c (x + 2)2 + (y - 12 = 15

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step-by-step explanation:

agngel

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have