Which set of ordered pairs does not represent a function? O {(9,0), (-5, -8), (2, -3), (-1,2)}
O {(-3,-5), (2,7), (-3,-4), (-1, -7)}
O {(–7,-4),(-1, –4), (5,2), (-8, – 7)}
O {(1, -8), (-3,4), (3, 1), (-7,4)}

the answer is the second choice.

Step-by-step explanation:

in order for the pair to be a function the x-values cannot be repeated.

the arc length is found by finding the circumference of the full circle (2xpixradius) and then dividing by 4 to find just one quarter of the circle (90 degrees).

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