First get terms properly grouped and placed x 2 3x y 2

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: at we could have this is to have both h and k be zero. So, the center and radius is, center = ( 0, 0 ) radius = 1 = 1 Don’t forget that the radius is the square root of the number on the other side of the equal sign. Here is a sketch of this circle. © 2007 Paul Dawkins 170 College Algebra A circle centered at the origin with radius 1 (i.e. this circle) is called the unit circle. The unit circle is very useful in a Trigonometry class. [Return to Problems] (b) x 2 + ( y - 3) = 4 2 In this part, it looks like the x coordinate of the center is zero as with the previous part. However, this time there is something more with the y term and so comparing this term to the standard form of the circle we can see that the y coordinate of the center must be 3. The center and radius of this circle is then, center = ( 0,3) radius = 4 = 2 Here is a sketch of the circle. The center is marked with a red cross in this graph. [Return to Problems] (c) ( x - 1) + ( y + 4 ) = 16 2 2 For this part neither of the coordinates of...
View Full Document

Ask a homework question - tutors are online