Question: graph a circle
1. The problem is to graph a circle.
2. The standard formula for a circle with center at $ (h, k) $ and radius $ r $ is:
$$ (x - h)^2 + (y - k)^2 = r^2 $$
3. Important rules:
- The center of the circle is at $ (h, k) $.
- The radius $ r $ is the distance from the center to any point on the circle.
4. For simplicity, let's graph a circle centered at the origin $ (0,0) $ with radius $ r = 5 $:
$$ x^2 + y^2 = 25 $$
5. This means all points $ (x,y) $ satisfy $ x^2 + y^2 = 25 $.
6. To graph this, plot points that satisfy the equation, for example:
- $ (5,0) $, $ (-5,0) $, $ (0,5) $, $ (0,-5) $
- Points like $ (3,4) $ since $ 3^2 + 4^2 = 9 + 16 = 25 $
7. Connect these points smoothly to form the circle.
Final answer: The graph of the circle is given by the equation $$ x^2 + y^2 = 25 $$ centered at $ (0,0) $ with radius $ 5 $.