Alibrarian was trying to figure out the number of books in the nonfiction section. the values below represent the numbers of books on each shelf of a corner bookcase. 27, 15, 23, 15, 22, 18, 16, 14, 23, 25, 13, 29 which measure of central tendency should the librarian use? the mean the median either the mean or median since they are the same neither the mean nor median because there is too much variability

either the mean or median since they are the same

answer: c, the green line

step-by-step explanation:

there is no black line, eliminate b.

simple interest implies periodic payments, but the red line shows no payments, eliminate d.

simple interest has equal payments. if paid say every day, the graph is about a straight line (actually a stairstep).

the yellow line is not straight, eliminate a.

check: the green line is straight, answer is c.

simple interest with positive interest rate gives a straight line sloping up to the right. green line:

g(t) = $100 + ($200-$100) ÷ (20 years) × (t years)

= $100 + (4%/year) × ($100)(t years)

incidentally, the yellow line curving upward represents continuously compounded interest

y = $100 × 2^(t years / (14 assuming the yellow line hits $200 at 14 years. 2^0 is 1, so y(0) = $100; 2^(14/14) is 2, so y(14) = $200.