Which relation represents a function?

a. (0,0) / ( 2,3) / ( 2,5) / ( 6,6)
b. (3,5 ) / (8,4) / (10,11) / (10,6)
c. (-2,2) / (0,2) / ( 7,2) / (11,2)
d. (13,2) / (13,3) / (13,4) / (13,5)

If y varies directly as x2 and y=6 when x=6, find the constant of variation.

Which expression is rational? 6. , square root two, square root 14, square root 49

]supplementary angles are two angles that add up to . • complementary angles are two angles that add up to degrees. • adjacent angles share a and a • congruent angles have the measure. • an triangle has one angle that is greater than 90 degrees. • a triangle with angles 45°, 45°, and 90° would be a triangle