Tuesday

January 27, 2015

January 27, 2015

Posted by **Jennifer** on Sunday, October 9, 2011 at 7:48am.

Find an equation of form y = A(x-h)^2 + k where vertex is (h,k) and constant A is a scaling factor.

So the vertex is (215.3, 116.3).

Plugging in I have

y = A (x-215.3)^2 + 116.3

Using point (0, 2.74), I have

2.74 = A (0-215.3)^2 + 116.3

2.74 = A (46354.09 + 116.3)

2.74 = A 46,470.39

0.000059 = A

**** shouldn't my A be negative to get a hill shape?

- algebra Please Help -
**drwls**, Sunday, October 9, 2011 at 8:46amYes. You made a mistake, placing the right parenth ) the right of the 116.3.

A will be negative if you solve

46354 A = 2.74 - 116.3 = -113.56

A = -0.0024498

Check: when x = 433.1,

y = -0.0024498(433.1-215.3)^2+116.3

= -116.2 +116.3 = 0.01

That's close enough.

**Answer this Question**

**Related Questions**

algebra - Suppose the ball was 2.74 feet above ground when it was hit. It ...

Algebra - A baseball is hit at a point 2 feet above the ground at a velocity of...

Alegra 2 - A baseball is hit at a point of 3 feet above ground at a velocity of ...

Math 10 - Hello, Is there easiest and simplest way to do this question? "A ...

Math 10 - Hello, I did this question for homework, but my teacher said it was ...

algebra - why is this a poor model for hitting a baseball? y = -0.002x^2 + 0....

Algebra I - After a baseball is hit, the height h (in feet) of the ball above ...

Physics - A baseball is hit at ground level. The ball reaches its maximum height...

physics - A baseball is hit at ground level. The ball reaches its maximum height...

Precalc - Fred hits a baseball 3 ft above ground at a velocity of 100 ft per sec...