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 = –4x

c. side angle side. u shares the same sides

take the logarithm of both sides (the base of the log doesn't matter):

apply the exponent property - this says that :

distribute the log terms on both sides:

group like terms together:

divide through both sides by the coefficient on :

you can do some additional rewriting here using the properties of the logarithm to simplify things if you like:

the cost of the pair of pants is $31.95

x:       y:  

-1         4

0         4

1         6

2         18

3         20