The statistics below shows the full time equivalent student (FTES) count for the history of Lake Tahoe Community College. Note that μ is the letter used for mean and σ is the term used for standard deviation µ = 1000 FTES
median = 1,014 FTES
s = 474 FTES
first quartile = 528.5 FTES
third quartile = 1,447.5 FTES
n = 29 years

Required:
What is the best prediction for the numbers of these years that have fewer than 1014 FTES?

Here is their argument. given the obtuse angle x, we make a quadrilateral abcd with ∠dab = x, and ∠abc = 90◦, and ad = bc. say the perpendicular bisector to dc meets the perpendicular bisector to ab at p. then pa = pb and pc = pd. so the triangles pad and pbc have equal sides and are congruent. thus ∠pad = ∠pbc. but pab is isosceles, hence ∠pab = ∠pba. subtracting, gives x = ∠pad−∠pab = ∠pbc −∠pba = 90◦. this is a preposterous conclusion – just where is the mistake in the "proof" and why does the argument break down there?

Which of the following expressions are equivalent ?

Find the equation of the trend line (line of best fit). show your work i'm using the points (34,76) (42,91)