Aparabola and its focus are shown on the graph. the vertex of the parabola is at (0,0). what is the equation of the directrix of the parabola?
a) y=3
b) y= -3
c) x= 3
d) x= -3

Step-by-step explanation:

Relation between focus, vertex and directrix-

The vertex of the parabola is at equal distance between focus and the directrix. As any point on the parabola is equidistant from both focus and directrix.

And the directrix is always perpendicular to axis of symmetry and does not touch the parabola.

From the graph, the focus is at (3, 0) and axis of symmetry is x axis or y=0 line.

So the directrix will be horizontal and on the left of the parabola.

Hence, the equation of directrix of the given parabola will be x= -3

answer: what do you mean

the most boring thing ever written

step-by-step explanation:

i am writing something. yes, i plan to make it the most boring thing ever written. i go to the store. a car is parked. many cars are parked or moving. some are blue. some are tan. they have windows. in the store, there are items for sale. these include such things as soap, detergent, magazines, and lettuce. you can enhance your life with these products. soap can be used for bathing, be it in a bathtub or in a shower. apply the soap to your body and rinse. detergent is used to wash clothes. place your dirty clothes into a washing machine and add some detergent as directed on the box. select the appropriate settings on your washing machine and you should be ready to begin. magazines are stapled reading material made with glossy paper, and they cover a wide variety of topics, ranging from news and politics to business and stock market information. some magazines are concerned with more recreational topics, like sports card collecting or different kinds of hairstyles. lettuce is a vegetable.