My guess is D, can anyone help?
2 answers:
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Answer:
○ C
Explanation:
Accourding to one of the circle equations, the centre of the circle is represented by
Moreover, all negative symbols give you the OPPOCITE TERMS OF WHAT THEY <em>REALLY</em> ARE, so you must pay cloce attention to which term gets which symbol. Another thing you need to know is that the radius will ALWAYS be squared, so no matter how your equation comes about, make sure that the radius is squared. Now, in case you did not know how to define the radius, you can choose between either method:
Pythagorean Theorem
Sinse we are dealing with <em>length</em>, we only desire the NON-NEGATIVE root.
Distanse Equation
Sinse we are dealing with <em>distanse</em>, we only desire the NON-NEGATIVE root.
I am joyous to assist you at any time.
Answer:
the first graph on the left
Step-by-step explanation:
Substitute the x- coordinate of the point indicated on the graph into the equation and check that this gives the value of the y- coordinate
(1, 6) ⇒ f(1) = 2 = 2 × 3 = 6 ← correct
(1, 9) gives y = 6 ≠ 9 ← not valid
(2, 8) ⇒ f(2) = 2 = 2 × 9 = 18 ≠ 8 ← not valid
(2, 12) gives y = 18 ≠ 12 ← not valid