www.edhelper.com is a pretty cool site; though it is subscription based, it has a large number of free problems here is their Algebra Page

There problems are remarkably similar to the SAT

## Sunday, November 19, 2006

### Canadian Math Problems

This is really good, the SAT problems have the same concepts as these problems:

Canadian Math Problems

ABP - Always Be Practing!

Canadian Math Problems

ABP - Always Be Practing!

## Tuesday, November 07, 2006

### b is backwards: Parabola - bx

Tutoring this weekend, I reviewed the standard equation of a parabola:

*ax ^{2} + bx + c = 0*

If you read my last posting on parabolas the constant "b" which is multiplied by x controls the movement of the parabola left and right in relation to the y axis.

If b = 0; then the parabola is centered exactly on the y axis

But if b > 0 (positive), the parabola shifts to the left.

Obviously if b < 0 (negative), the parabola shifts to the right

Looking at this normally, it just looks backwards - but it is true.

So remember, b is backwards.

If b = 0; then the parabola is centered exactly on the y axis

But if b > 0 (positive), the parabola shifts to the left.

Obviously if b < 0 (negative), the parabola shifts to the right

Looking at this normally, it just looks backwards - but it is true.

So remember, b is backwards.

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