Answer:
The first table
Step-by-step explanation: The x values don't repeat which makes it a function
Answer: 11
Explanation: You did everything right in terms of the steps you took. It looks like you accidentally wrote "1" instead of "-4" as the answer to "2(-2)".
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This is what we know:4x^2 + 12x + c = (2x + k)^2
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4x^2 + 12x + c = 4x^2 + 2kx + 2kx + k^2
c=9
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The trapezoid has one pair of parallel sides.