Vocabulary Part One
Direction of a Parabola
Vocabulary Part Two
Graphing a quadratic function
Identifying quadratic functions
100
Any function that can be written in standard form, y=ax2 +bx+c
What is a quadratic function?
100
Up, 5 is positive
y = 5x(squared) Does the parabola open up or down?
100
To form a trinomial that is a perfect square.
What does it mean to complete the square?
100
Find the axis of symmetry. x=-b/2a
What is the first step to graphing a quadratic function?
100
No
If a quadratic equation cannot be written in the form of y= ax(squared) + bx + c is it quadratic?
200
The curve of a quadratic function.
What is a parabola?
200
Down
y = -3x(squared) +6 Does the parabola open up or down?
200
x-value that makes the function equal to 0,same as the x intercept
What is zero of a function?
200
Find the vertex. Plug the axis of symmetry in for the x.
What is the second step to graphing a quadratic function?
200
No
Is the function quadratic? x=-2, -1, 0, 1,2 y=-1, 0, 4, 9, 15
300
The highest or lowest point on a parabola.
What is a vertex?
300
the y value of the vertex if a >0
What is a minimum value?
300
y coordinate, where a graph intersects the y axis
What is a y intercept?
300
Find the y intercept. Identify c in the given equation (0, c)
What is the third step?
300
x=-1 then y=-4,x=0 then y=-5, x=1 then y=-4, x=2 then y=-1
Use a table of values for y=x(squared)-5
400
A vertical line that divides a parabola into two symmetrical halves.
What is the axis of symmetry?
400
the y value of the vertex if a <0
What is the maximum value?
400
x coordinate of a point,where x intersects the x axis
What is an x intercept?
400
Find two or more points on the same side of the axis of symmetry. Choose x values less than the axis of symmetry.
What is fourth step to graphing a quadratic function?
400
If x=0 then y=-8, if x=1 then y= -5, if x=2 then y=4
Use a table of values for y= 3x(squared)-8
500
An equation that can be written in standard form, ax2+ bx + c = 0
What is a quadratic equation?
500
6
If the vertex is (1,6), what is the maximum value?
500
The part of the equation under the radical sign
What is a discriminant?
500
Graph the axis of symmetry, vertex, the point containing the y intercept and two other points.
What is the fifth step to graphing a quadratic function?
500
Up because the 7 is positive.
Tell whether the graph of each quadratic function opens up or down. y=7x(squared)-4x
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