Vocabulary HW 4/7

Parabola

A parabola is a mirror- symmetrical curve. Made from an exponent in an equation.

The picture is an example of a parabola on the y axis.

ax^2 + bx + c = 0 ----- This is the format of a quadratic.

This is an example of one.

Vertex

The minimum or maximum point of a quadratic function.

This shows the vertex of a parabola.

Axis of Symmetry

The graph of a quadratic function is a parabola. The axis of symmetry of a parabola is a vertical line that divides the parabola into two congruent halves. The axis of symmetry always passes through the vertex of the parabola.

This shows the axis of symmetry.

Maximum Value

The maximum value is the highest point on the y axis.

Here is an example of the maximum value.

Minimum value

The minimum value is the lowest point on the y axis.

Here is an example of the minimum value.

Terms

A term is a part of an equation or experession. There are usually multiple terms to an equation and they are usually separated by plus and minus signs.

These are terms.

First Differences

The first difference is all the numbers in a set subtracted in order.

Here is an example: 26 minus 17 is 9, 17 minus 10 is 7 etc.

Second Differences

The second difference is the second step in reducing the set of numbers. Once all the numbers are the same, you are done. This could be the first differences or the second or more.

This shows the second step or second differences.

Zeros (Roots)

There are 2 roots in a quadratic. this is where the line crosses the x axis.

In this case it is -1 and -5