Consider the function $f(x)=\frac{2x+7}{6x+3}.$ For this function there are two important intervals: $(-,A)A,A.$

Find $A$

For each $of$ the following intervals, tell whether $f(x)is$ increasing $or$ decreasing.

$(-,A)$ : Select $an$ answer $$

$(A,)$ Select $an$ answer $$

Note that this function has $no$ inflection points, but $we$ can still consider its concavity. For each $of$ the

following intervals, tell whether $f(x)is$ concave $upor$ concave down.

$(-,A)$: Select $an$ answer $$

$(A,)$ Select $an$ answer $vv$