If your trying to be good at math I need help with this how to do ratios??
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How do you answer this question? (step by step)

Consider the table below. x y -1 -5 0 5 1 11 2 13 3 11 complete the standard form equation representing the quadratic relationship displayed above, where a, b, and c are constants.

An objects motion is described by the equation d= 4sin (pi t) what will the height of the object be at 1.75 seconds?