parabola problem: y^2=12x

[jonathan123]

ok this is what i have y^2=12x, and i need to find:
a)focus coordinates
b)directrix equation
c)graph

thanks!!

 

[wjm11]

ok this is what i have y^2=12x, and i need to find:
a)focus coordinates
b)directrix equation
c)graph

thanks!!

What do you know? What work have you done? What have you tried?

To learn about parabolas, go here:

http://www.purplemath.com/modules/parabola.htm

 

[srmichael]

ok this is what i have y^2=12x, and i need to find:
a)focus coordinates
b)directrix equation
c)graph

thanks!!

Please click on this link READ BEFORE POSTING then we can talk.

 

[jonathan123]

ok this is what i have y^2=12x, and i need to find:
a)focus coordinates
b)directrix equation
c)graph

thanks!!

ok, im in 10th grade, but i cant start the problem because i dont understand why there is only y^2=12x and i am used to the big equations... please i need help

 

[wjm11]

ok, im in 10th grade, but i cant start the problem because i dont understand why there is only y^2=12x and i am used to the big equations... please i need help

If you are a little confused, a good way to start is to make a small xy table and plot a few points. HINT: The vertex is at (0,0) and the parabola open up sideways.
2nd HINT: Try taking the square root of both sides of the equation, then plot it on a graphing calculator.
3rd HINT: study: http://www.purplemath.com/modules/parabola.htm

 

[mmm4444bot]

i cant start the problem because … i am used to the big equations

What?!

You must have misspoke.