9. which relation represents a function? a. {(−1, 3), (0, −1), (1, 3), (2, 5)} b. {(1, −1), (−1, 0), (1, 1), (3, 2)} c. {(5, −1), (3, −1), (4, 1), (5, 2)} d. {(−4, 2), (1, −2), (0, 0), (1, 1)}

{0,1,2,3,4,5,6,20,21,22,23,24,25} the distribution is considered to be: skewed the right, skewed the left, not skewed?

Apinhole camera is made out of a light-tight box with a piece of film attached to one side and pinhole on the opposite side. the optimum diameter d(in millimeters) of the pinhole can be modeled by d=1.9[ (5.5 x 10^-4) l) ] ^1/2, where l is the length of the camera box (in millimeters). what is the optimum diameter for a pinhole camera if the camera box has a length of 10 centimeters

Last week jason walked 3 1/4 miles each day for 3 days and 4 5/8 miles each day for 4 days. about how many miles did jason walk last week?