A parabola and its focus are shown on the graph. The vertex of the parabola is at (0,0). On a coordinate plane, a parabola opens to the right. It has a vertex at (0, 0) and a focus (3, 0).

What is the equation of the directrix of the parabola?

y = 3
y = –3
x = 3
x = –3

Pranav and molly are selling pies for a school fundraiser. customers can buy blueberry pies and pumpkin pies. pranav sold 6 blueberry pies and 4 pumpkin pies for a total of $106. molly sold 6 blueberry pies and 3 pumpkin pies for a total of $90. find the cost of each of one blueberry pie and one pumpkin pie