Which is the BEST estimate of the correlation coefficient of a linear model between the number of items purchased and total amount of money spent at the grocery store? A). r = 0.1
B). r = -0.5
C). r = 0.3
D). r = 0.8

Graph y ≥ -x^2 - 1. click on the graph until the correct graph appears.

Just tell me how to set up the equation.

In the following diagram it is given that dec,ab || dc, ad || eb, and ad is congruent to bc. a)why isn't abc a parallelogram even though it has a pair of parallel sides and a pair of congruent sides b)explain why be must be congruent to bc. further explain what type of triangle this makes triangle abc and what it tells you about angle 1 and angle 2c) finally why must angle 3 be congruent to angle 1? further, explain why we know that angle 3 is congruent to angle 2