80 because 81 is closer to 80 than 90
A function is a law that tells you how to associate inputs (x values) and outputs (y values).
In the case of constant functions, it doesn't matter which input you choose, the ouput must always be the same.
So, a constant function has always the same output (y values) for every input (x values) you feed.
X=6, and x= -3
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30% is equivalent to 0.3. So 15 x 0.3 = 4.5. Therefore, 30% of $15 is $4.50.
720/90 = 8 your answer is 8 hamburgers