Which equation does not graph a line? a) y = 5 b) y = -3x3 c) y = 2 3 x eliminate d) y = −8x

Letter B has a power of 3 so it is a cubic function and will not graph as a line.

y = 5 is a horizontal line
y = 23x is a line with positive slope
y = -8x is a line with negative slope