A parabola with a vertex at (0,0) has a directrix that crosses the negative part of the y-axis. Which could be the equation of the parabola?

x2 = –4y
x2 = 4y
y2 = 4x
y2 = –4

How can (square root of 25) ^2 be rewritten?

(c) the diagram shows the first three shapes of a matchsticks arrangement.first shape = 3second shape = 5third shape = 7given m represents the number of matchstick used to arrange the n'th shape.(i) write a formula to represent the relation between m and n. express m as the subjectof the formula.(ii) 19 matchsticks are used to make the p'th shape. find the value of p.

15 points what is the end behavior of this graph? & what is the asymptote of this graph?