Clinical psychologists work with patients who have mental, emotional and behavioral disorders. The field represents a prominent specialty within the broad field of psychology.ducation and Training. Clinical psychologists typically have a doctorate, usually a Psy.D. degree, which is a doctor of psychology. Some obtain a Ph.D., which is a doctor of philosophy.
In short, to find a limit graphically, you simply follow the graph horizontally, until you reach the desired x-value, at which point you then look to see the what the corresponding y-value is, or is approaching. To be more specific, suppose you are looking for the limit as x approaches from 5 from the RIGHT side of #y=x^2#.
Thus, the only points at which a function can have a local maximum or minimum are points at which the derivative is zero, as in the left hand graph in figure 5.1.1, or the derivative is undefined, as in the right hand graph. Any value of $x$ for which $f'(x)$ is zero or undefined is called a critical value for $f$.