What is the mean for this list of numbers? 17, 19, 21, 23

20.

Step-by-step explanation:

The mean = (sum of the numbers)  / 4   as there are  a total 4 numbers in the list.

Mean = (17+19+21+23) / 4

= 80 / 4

= 20.

1 number

if we use a graphing calculator, there is only one such number that satisfies the conclusion of the mean value theorem, that is, a number such that

where the right-hand side is the average rate of change of f on the interval [0.5,0.75], which is the slope of the secant line.

in the attached graph, the black line is the secant line which has its slope as the average rate of change of f on [0.5,0.75], while the orange line is the only tangent line to the graph of f in the interval that satisfies the mvt conclusion.