Question

PLEASE HELP!

Answer 1

I'm not sure about this one. I think it's D but I don't know

Answer 2

how did you come to D

Answer 3

I'm honestly guessing on this one. I don't understand it. The lesson really didn't explain it well in my opinion

Answer 4

General formula of a circle is
\[(x-h)^{2} + (y-k)^{2} = r ^{2}\]

Where (h,k) are the coordinates of the centre of the circle and r is the radius

Answer 5

From the graph, the radius of your circle is 2 units and the centre of the circle is the origin (0,0). Hence the equation of the circle is \[x ^{2} + y ^{2} = 4\]

Answer 6

That makes a lot more sense than in the lesson. Thanks