What is equivalent to 8x4/8

Which of the following is most likely the next step in the series? a3z, b6y, c9x, d12w, е15v, f18u

Write an equation in slope intercept form of the line passes through the given point and is parallel to the graph of the given equation (0,0); y=3/8 x+2

The graph of a hyperbola is shown. what are the coordinates of a vertex of the hyperbola? (0, −4) (−3, 0) (0, 0) (0, 5)