math
posted by MELISSA .
In math class, students must randomly draw a card that contains an equation that they must graph on the board.
If the cards contain the equations 2y = 4x + 2, x(x + 1) = 0, 2x + y = 0, x = 2y , x2 + 1 = 0, and y  2x = 0, then what is the probability that a student will graph a line whose slope is 2?

I see 6 equations.
Of those only one has a slope of 2
mmmhhh?