Which of the following is an odd function? g(x) = x2 g(x) = 5x – 1 g(x) = 3 g(x) = 4x

The best way to tell is by graphing them

an even function is symmetric about the y-axis
an odd function is symmetric about the x-axis

g(x) = x^(2) is even (is a parabola)

g(x) = 5x-1 is not even or odd (is a diagonal line)

g(x) = 3 is even (an is also a horizontal line)

g(x) = 4x is odd (diagonal line through the origin)