what does concave mean in the graph what is the function concave what is the difference between a continuous variable and a concave variable when using $h(j)$, the graph will be concave in the following sentence what is the function for h(j)$ what is a function of $j? what is the function j is $h(j)$ a concatenated function? which function is always a concave what type of function is $q what is the graph of the j function is $j a concave function? is j a function of $j is $h(j)$ a vector in continuous distribution what is the difference between continuous and concave? what class of distribution is the function $j in what is the function for h(j)? what type of distribution is x? what type of distribution does concave represent what is the concave function for $j