You can use derivatives to answer this question

First you must find the critical points, take your first equation and differentiate and solve for 0

Now that its differentiated solve for 0

you a critical point at x = -1.5 and x = 0

now to find a graph is increasing you plug your critical points back in the derivative and if its <0 graph is decreasing >0 increasing

to find concavity you take second derivative and plug in critical points if

>0 then concave up and <0 concave down

the second derivative is

plus in 0 and -1.5

plug 0 in and you see it is >0 so intervals from 0 to infinity is concave up

plug -1.5 it is also concave up because > 0 so from -inf. to -1.5

sorry for lack of work studying for finals