Posted by **Bri** on Sunday, March 20, 2011 at 6:18pm.

tell whether the graph opens upward or downward. then find the axis of symmetry and vertex of the graph of the function

1. y=xsquared-5

2. y=-2*xsquared+6x+7

- algebra (parabolas) -
**Damon**, Sunday, March 20, 2011 at 7:00pm
x^2 = (y + 5)

when x gets big, y gets big, opens up (holds water)

symmetric about y axis (x = 0)

vertex at (0,-5)

2 x^2 - 6 x = - y + 7

x^2 - 3 x = -(1/2)y + 7/2

add (3/2)^2 = 9/4 to both sides

x^2 -3 x +9/4 = -(2/4)y + 23/4

(x-3/2)^2 = -(1/4)(2y-23)

axis at x = 3/2

vertex at (3/2 , 23/2)

when x gets big, y gets big negative. Opens down (sheds water)

## Answer this Question

## Related Questions

- algebra (parabolas) - find the axis of symmetry and vertex of the function. tell...
- algebra (parabolas) - find the axis of symmetry and vertex of the function. tell...
- Math; Please Help!o: - Tell whether the graph opens upward or downward. Then ...
- Algebra - Tell whether the graph opens up or down. Find the coordinates of the ...
- math help,algebra - Okay this is what i have to do but i think i am doing ...
- math, algebra,graphs help - THe directions state: (A)Complete the table, (B) ...
- Algebra,Math, graphs help - This is what the directions state to do: (A) ...
- ALGEBRA 1 - Please check for me.Without drawing the graph of the given equation ...
- ALGEBRA 1 - Please check for me.Without drawing the graph of the given equation ...
- College Algebra - 1.Answer the following for the given quadratic function. f(x...