Answer: Your answer is the third one, a function assigns to each input exactly one output.
If you have a true function, there will only be one output for each input, if you had more than one, it isn't a function.
The equation of a circle:

(h,k) - the coordinates of the centre
r - the radius
The answer is D.) -2x^5y^3 + 4x^2y^2 + x^2
1st is parallel
2nd is perpendicular
3rd is perpendicular
4th is perpendicular
Answer:
f(6) = 24
Step-by-step explanation:
f(x) = x^2 - 2x
Let x = 6
f(6) = 6^2 - 2(6)
= 36 - 12
= 24