Jacob is solving the equation below using successive approximations. he started from a graph where he found the solution to be between 1 and 2. using the lower and upper bounds from the graph, jacob did the following work for the first iteration.

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