Correlation, Causation, and Random Questions
The value of y varies directly with x. When the value of x is 8, the value of y is −16.
What is the constant of variation when y is a function of x?
-2
What is the slope of the function:
y=-3x+3
-3
(0,0)
If f(x) = 3x2 − 7, what is the value of f(6)
101
What steps would you take to find certain points on the line using your calculator:
y=3x+4
Push 2nd, Graph (Table) to see all values
What is the slope of the line x=5?
Undefined
The y-intercept of the line represented by the equation:
2x + 3y = 6
2
Function g is defined by g(x) = x2+8x+12. What are the solutions to g(x) = 0?
x=(-6) AND x=(-2)
In a function, there are no repeated ____ Values
How would you use your graphing calculator to find the answers to this question:
Function g is defined by g(x) = 3x2 − 2x − 5. What are the solutions to g(x) = 0?
Find the zeros (Push 2nd, Calc, 2-zero)
push left/right arrow to get cursor above the x-axis and below the x-axis to get left zero.push left/right arrow to get cursor below the x-axis then above the x-axis to get the right zero.
An R value of -0.91 has this type of correlation.
The universal substitution point to determine whether a solution is included in the solution set for a system of inequalities.
(0,0)
F(x) = x2+2x-3 has a (minimum, maximum) value of _______.
Minimum
-4
What is the initial deposit amount?
A(t) = 1,550(1.02)t
1550
If you are asked to graph
y= 3x2-2x-50
What would you need to adjust to be able to see the minimum of the graph?
The Y-Min of the menu.
What is the solution to this inequality?
12 − 4w > 2(w − 18)
w<8
An athlete ran at a constant speed for 10 seconds. The linear function is written in such a way that the distance the athlete ran in yards, y, is a function of the time in seconds, x. What is the domain of the function for this situation?
0 < x < 10
(0 is less than or equal to x and x is less than or equal to 10)
If the maximum of a quadratic function is at (2,0), how many real zeros does this function have?
1
A company currently has 300 employees. The number of employees is expected to grow at a rate of 3% each year.
Write an exponential function to model the number of employees in the company, y, after x years
Using your graphing calculator:
What are the steps for finding the best fit linear function when given a table of values?
Turn on Diagnostics (2nd, 0, DiagnosticsOn)
Put Data into L1 and L2 (Stat -- Edit)
Find Linear Regression Equation (Stat--Calc--LinReg)
How many solutions does this system have?
6x − 2y = 10
y = 3x − 5
Infinite solutions
The solution to this system of equations :
−3x + 5y = 21
6x − y = −15
(-2,3)
F(x) = x2 .
What is the vertex of g(x) if g(x) = f(x-2) +4
(2,4)
What is the equation of the asymptote of the graph of the function y = 16(0.75)x?
y = 0
How do you clear the memory of your Ti-84 Calculator?
Press:
2nd + 7 1 2