Friday

November 21, 2014

November 21, 2014

Posted by **Sandra** on Sunday, July 19, 2009 at 3:19pm.

- algebra -
**Damon**, Sunday, July 19, 2009 at 3:38pmSketch those points on a graph.

It is an upside down parabola (sheds water)

The axis of symmetry is x = 5

when x = 5, y = 4

so

for starters

y-4 = c (x-5)^2

That is the same both sides of x = 5

and y = 4 when x = 5

We need c

put in one of those other points

for example (0,-21)

-21 -4 = c (-5)^2

-25 = c (25)

c = -1

so

y-4 = -(x-5)^2

or

y = 4 - (x-5)^2

check with (3,0)

? = 4 -(-2)^2

? = 4 - 4

0 sure enough

**Answer this Question**

**Related Questions**

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 ...

Algebra - I'm trying this again, I'd like the quadratic form, so i can then work...

math (parabola) - Hi, the question is: Write the equation of the parabola with ...

Algebra2.... - 1.) Y=-lx+1l+3 Are these correct? y-intercept=(0,2) x-intercept=(...

math - A parabola has the equation y = 4(x-3)^2-7 Choose 2 true statements: A) ...

algebra - 6. Find the equation of each parabola described below. a) parabola ...

algebra - Suppose a parabola has a vertex (-4,7) and also passes through the ...

Alg II/Trig - A parabola has a vertex at (0,0); a horizontal axis; and the point...

math - A parabola has the equation y = 4(x-3)^2-7 Choose 2 true statements: A) ...