1.) How do you answer this?(adsbygoogle = window.adsbygoogle || []).push({});

Find the equation of the line that has a slope undefined and passes through the points (3, -4).

I got y=-4

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2.) Write the standard and general equations of the circle with radius 4 and center (1,2).

I got STANDARD: (x-1)^2 + (y-2)^2=16

I don't understand the whole GENERAL FORM!

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3.) Then I have this: Give the center, radius, and all intercepts of the circle: x^2+y^2+4x-2y-20=0.

I am stuck on this one completely.

Thank you for all help!!!!!!!!!!!!!!!!

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# Math help! Circles and slope

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