Vocabulary

Quadratics Chapter 9

parabola

*a symmetrical open plane curve formed by the intersection of a cone with a plane parallel to its side

If you kick a soccer ball it will arc up into the air and come down again like the shape a parabola makes

quadratic

*involving the second and no higher power of an unknown quantity or variable

http://www.mathsisfun.com/algebra/quadratic-equation-real-world.html

^examples

vertex

*each angular point of a polygon, polyhedron, or other figure

A quadrilateral has 4 vertexes that are the four corners of the quadrilateral. They make up the shape.

axis of symmetry

*a vertical line that divides the parabola into two congruent halves; it always passes through the vertex of the parabola

If you had a paper heart and it were to be folded in half along the axis of symmetry, then the two halves would be the same, they would match up.

maximum value

*Maximum Value: The maximum value of a quadratic function f(x) = ax2 + bx + c where a< 0,="" is="" the="">y- coordinate of the vertex.

If you were a skater and you were at the top of the half pipe, you would be standing at the maximum of the parabola that is the half pipe.

minimum value

*Minimum Value: The minimum value of a quadratic function f(x) = ax2 + bx + c where a > 0, is the y- coordinate of the vertex.

If you were a skater and you were skating at the lowest point of the half pipe, you would be standing at the minimum of the parabola that is the half pipe.

term

*each of the quantities in a ratio, series, or mathematical expression

The number 5 goes and gets into the first slot of the term, then an addition sign joins in. After that, an 8 comes into the slot after the addition sign. An equal sign comes next, then the number 13 which is also the answer.

zeros (roots)

*Algebraically, a root or a zero is the solution to an equation

Three guys want to split 18 dollars so how much does each person get. The equation is then 3 x = 18 which is really 3x - 18 = 0 or 3x - 18 = y when y = 0

creds: http://www.mathisfunforum.com/viewtopic.php?id=13064