Which of the following sets of points is a direct variation? (0, 0); (2, 4); (5, 15)
(0, 0); (-1, -2); (1, 2)
(3,6); (-2, 4); (-1, 2)
(0,5); (1, 6); (2,7)

Which of the greatest common gcf of 32 and 48 a 16 b 96 c 8 d 32

Aclassmate thinks that solving a system by graphing gives an exact answer when the lines appear to cross at a grid point, but only an approximate answer when they don't. explain why this isn't true.

Two cities a and b are 1400km apart and lie on the same n-s line. the latitude of city a is 23 degrees. what is the latitude of city b. the radius of the earth is approximately 6400km.