Question 1205883
your solution is selection D.
Ⓓ The function d(t) is increasing when t < 4.5.


the maximum value is at y = 5.25 when x = 4.5
the axis of symmetry is at x = 4.5
the range of the function is 3 <= x <= 6.
it is not 3 < x < 6 because 3 and 6 are the low value and the high value of the range.


you can see that in the following table and graph.


<img src = "http://theo.x10hosting.com/2024/013001.jpg">


the only selection that is true is selection D.
the functions is increasing when x < 4.5 and decreasing when x > 4.5
the function is maximum when x = 4.5.