1. Dora was born in 1981. Her son Tanner
was born 25 years after Dora. Which
equation could be used to find the
year y in which Tanner was born?
A Y + 25 = 1981
B y - 25 = 1981
c y x 25 = 1981
D y - 25 = 1981
please help thanks

B or C (they're the same?)

Step-by-step explanation:

y - 25= 1981

y = 1981 + 25

y = 2006

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.