What is s = 2d/t, after it says solve for d

Consider the functions below. function 1 function 2 function 3 select the statement which is true about the functions over the interval [1, 2] a b function 3 has the highest average rate of change function 2 and function 3 have the same average rate of change. function and function 3 have the same average rate of change function 2 has the lowest average rate of change d.

10 points? me . its important ‼️‼️

Two years ago a man was six times as old as his daughter. in 18 years he will be twice as old as his daughter. determine their present ages.