The highest or lowest point of a parabola is called the _____.
Vertex
Give the y-intercept:
y = 3x2 + 2x - 5
(0, -5) or -5
(x+3)2
x2+6x+9
Where do we look on the graph to know the time when an object hits the ground?
- Where the graph hits the x axis
- x-intercepts
- zeros
Give the x - intercepts:
y = (x + 4)(x - 8)
(-4, 0) and (8, 0)
Which coordinate of the vertex do we look at to give the max height of the object?
y coordinate.......(x,y) = (time, height) in any ordered pair
Find the pattern:
(0, 1) (1, 2) (2, 5) (3, 10) (4, 17)
Hint: make an x / y table with the ordered pairs
x2 + 1
(x - 5)2
x2 - 10x + 25
Where do we find the height from which an object was thrown?
- y-intercept
- y axis
The x-intercepts of:
y = (5x + 4)(x - 2)
(-4/5, 0) and (2,0) or
(-0.8, 0) and (2,0)
-3(x+5)(2x-7)
-6x2 - 9x + 105
What is the starting height of the object if the model of its height is given by the equation:
y = -16x2 + 45x + 35
35
The y-intercept of:
y = 5(x-3)(x-8)
120 or (0, 120)....multiply the constants: 5(-3)(-8)