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What is (28 + 7 + 6 + 3) x 1/2 show your work

Complete the standard form of the equation that represents the quadratic relationship displayed above, where a, b, and c are rational numbers.

The test scores of 32 students are listed below. construct a boxplot for the data set and include the values of the 5-number summary. 32 37 41 44 46 48 53 55 57 57 59 63 65 66 68 69 70 71 74 74 75 77 78 79 81 82 83 86 89 92 95 99