Alyssa's test scores are listed below 77, 80, 91, 85

Part A: Calculate the mean AND median of the given data. Show all your work. (2 points)

Part B: Alyssa just finished taking a fifth test. What score must she earn on her fifth test in order to have at least a 85% test average. Show all your work. (2 points)

Part C: How was the median affected by the addition of the fifth test score? (1 point)

Will mark branlist if correcto

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its 4 because 2 times 2 is 4, if you double the number two you get four

the direct variation says that:

then the equation is of the form is given by:

            where k is the constant variation.

from the given table:

consider any value of x and m(x)=y

x = 2 and m(x)=y = 3

substitute these value in [1]; we have;

divide both sides by 2 we get;

⇒

check:

put x = -1 and m(x) = -1.5

substitute in the equation:

-1.5 = -1.5                   true

therefore, the function m(x) represents a direct variation

graph of this function as shown below: