In which direction does the parabola open?

y = 3x^2 – 5x – 10

A.
left

B.
up

C.
down

D.
right
I think it's C?

Question

In which direction does the parabola open?

 

        y = 3x^2 – 5x – 10

 
  
 
 

 

 
  

  A. 
  left   
   

 

 
  

  B. 
  up   
   

 

 
  

  C. 
  down   
   

 

 
  

  D. 
  right  
I think it's C?

samsan9 · Answer

B

samsan9 · Answer

if it is bigger than x>0 then it is up

samsan9 · Answer

no can please some one help me XC

aum · Answer

If y = ax^2 + bx + c
and if a is positive, then it is a vertical parabola that opens UP.
If a is negative, then it is a vertical parabola that opens DOWN.

If Ix = ay^2 + by + c
and if a is positive, then it is a horizontal parabola that opens RIGHT.
If a is negative, then it is a horizontal parabola that opens LEFT.