The second choice is not a relation.
The first and third choices have multiple (input, output) pairs that have the same input. Such a relation is not a function. Any time you see this, you know the relation is NOT a function.
The best answer is the 4th choice ...
... {(0, -9), (-9, 0), (-3, -3)}
Answer:
(16π - 32) in²
Step-by-step explanation:
In the picture attached, the circle is shown.
Area of one-quarter of circle = 1/4*Area of a circle = 1/4*π*radius² = 1/4*π*8² = 16π in²
Area of the triangle = 1/2*base*height = 1/2*8*8 = 32 in²
Shaded area = Area of one-quarter of circle - Area of the triangle = (16π - 32) in²
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For every person that walked there were 12 who drove and if the 270 made the trip then 87 walked