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14 Cards in this Set

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  • Back
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A functions is...

A set of ordered pairs (x, y) such that fir each value of x there is a corresponding single value of y.

The domain of functions is the ___ value

X

The range of a function is the ____ value

Y

Equation to find the discriminate is...

B^2-4ac

The discriminate determines...

The nature if the roots.

If b^2-4ac <o the graph will...

Not touch the x axis. There are no real roots.



If b^2-4ac = 0 the graph will...

You b the x axis at the vertex. There are only one root or two equal roots.

If b^2-4ac >0 the graph will

Touch the x axis at two points. There are two distinct real roots.

The vertex for a point if a >0 and the y-ci-doezinats if the vertex is k.

Minimum

The vertex for a point if a <0 and the y-ci-doezinats if the vertex is k.

Maximum.

General form for a quadratic.

Y= ax^2+bx+c

^2

How do you find y-intercepts.

Set x = 0

Y = a (0)^3 +b (0)+c


Y = c

How do you find the x intercepts

Set y = 0



Either by factoring or quadratic formula

Ax^2+bx+c


What is the quadratic formula?

(-b+-2 root b^2-4ac)/ (2a)