Y - intercept and Roots
R value
Forms
Systems of Equations
Random
100
What is the y-intercept of y = 3x2 + 8x - 1?
(0, -1)
100
If the R value is 0.98888, is the fit strong or weak?
Strong
100
Which quadratic form is this?
y = -(x + 3)(x - 4)
Intercept Form
100
What is/are the solutions to this system?
(0, 3) and (4, -5)
100
What does the graph look like? Describe it.
y = -2x(x - 9)
Quadratic opening downward passing through the origin and (9,0)
200
What is the y-intercept?
(0, -10)
200
Would the R value of this line be strong or weak? Why?
Strong because the equations fits the data
200
What form is this?
y = x2 + 5
Standard form
200
What are the solutions?
(1, 1) and (-3, 4)
200
What is the name of the highest point for a quadratic function?
Maximum
300
What is/are the x-intercept(s)?
y = (x + 4)(x + 1)
(-4, 0) and (-1, 0)
300
Would an equation with an R value of 0.00009 be strong or weak?
Why?
Weak because an R value close to 0 means it is weak
300
What form is this?
y = 2(x - 1)2 + 5
Vertex Form
300
What is/are the solutions to this system?
(1, 8) and (4, 5)
300
What is the name of the lowest point for a quadratic function?
Minimum
400
What is the y - intercept of
y = 5x - 19?
(0, -19)
400
Would the R value for this equation be strong or weak? Why?
Weak because the equation does not fit the data
400
What is the vertex of this equation? How do you know?
y = (x - 4)2 + 6
(4, 6) because it is in vertex form
400
Give coordinate(s) of the solution to the system graphed.
Why is this?
(x, y) = (4, -5) because they only cross once
400
What are two words for the points where a quadratic crosses the x-axis?
Zeros, X-intercepts
500
What are the roots of the graph?
No roots.
500
What type of equation would you use to fit this data? Why?
Quadratic because it is U shaped
500
What is the vertex of this equation?
y = (x + 2)2 - 4
(-2, -4) because the equation is in vertex form
500
What is/are the solutions to this system?
No solutions
500
What type of data would be best for a quadratic equation: today's temperature, your weight, or the number of babies born each month in 2017?
Why?
Today's temperature because the temperature rises to a maximum point and then drops