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P2 Topic 2: Functions
y=|ax2+bx+c| backmore
Investigate the effect of changing a, b or c.

Summary
The graph of y = |ax2+bx+c|:
  • is always positive
graphic calculatorA note about graphic calculators
A graphic calculator may be allowed in your exam. The TI-83, or similar model, can display modulus graphs for you.

Select the Y= screen:
Enter Y1 = abs(AX2+BX+C) (Find abs in the CATALOG menu)
Then select the GRAPH screen. You can then choose different values for the constants A, B and C. For example, to make B = 1, press 1 store ALPHA B.
JavaMath interactive graphs Based on free Java applets from JavaMath