A circle has a diameter of 41 centimeters Which equation can be used to find the radius of this circle? 41 T= 2(41) T417​

If we are given diameter and we need to find radius then,

Radius(r) = Diameter(d) ÷ 2

⇒ r = d÷2

So here d = 41

So r = d÷2

⇒ r = 41 ÷ 2

⇒ r = 20.5

The domain is the x-values used by the graph.  (See Domain/Red graph.)

The range is the y-values used by the graph. (See Range/Blue graph.)

As long as the graph passes the vertical line test, it is a function.  Does this pass the vertical line test?  Does any vertical line hit the graph more than once?