To determine the average height of university students, researchers survey members of the university’s basketball team. The average height based on the 56 members of the basketball team was 6 ft 2 in. Is this estimate probably too high or too low? A. Too low because of undercoverage bias
B. Too high because of undercoverage bias
C. Too high because voluntary response samples overestimate average results.
D. Too low because convenience samples underestimate average result
E. Too high because of response bias

Answer observational;

They way i figured it, i got the answer of a. $120,200

You need to figure out at which x-value does the graph has a tangent line slope of -1.remember, the derivative is the slope of the tangent line. so find the derivative function and set it to equal -1 to find the x-value that will have a tangent line slope of 0.differentiate with the chain rule.    set the derivative to equal -1 and solve for x.      take log base 10 of both sides. also recall that  .    so the x-coord of the point of tangency is .the y-coordinate of this point of tangency can be calculated using the original function:     using point-slope form, the equation of the tangent line is      the x-intercept of this tangent line is when the graph is at y=0.    this rounds off to  .choice c.