#3. A, C
The function increases from negative infinity to 3, at which point it switches to decreasing, and also from 5 to infinity, where we see it go up.
#4. B
The function is going down, or the y-values are decreasing, from 3 to 5.
#5.
Local Maximum = (3,4)
Local Minimum = (5,0)
#6. x = 2, x = 5
Hope this helps!