y=10 is a function, x=-3 is not a function, 3x+2x=3 is not a function, first graph (the curved one) is a function, (-2, 6), (-3, 7), (-4, 8), (-3, 10) is not a function, second graph is a function
first one is a function, second is not, third is, fourth isnt
(-5,2) and (-5,1), (6,-5) and (6, 5), (2,2) and (2,3), (-1, 0) and (-1, 6)
