F is a trigonometric function of the form f(x) = a cos(bx + c) + d.
Below is the graph of f(a). The function has a maximum
point at (-2, -3) and a minimum point at (–2.5, -9).
Find a formula for f(x). Give an exact expression.
f(x) =

Kilgore trout creates a new scale to diagnose depression. however, his scale only assesses one symptom of depression while ignoring others. which of the following is his new scale most likely lacking? a) test-retest reliability b) discriminant validity c) criterion validity d) alternate-forms reliability e) content validity f) none of the above