Consider the formula D = 6/H.
Complete the sentence:
D is _______________ related to H with a constant of proportionality of _____________.
Inversely, 6
100
X represents how old a child is and y represents how many hours of TV they watch each week. Find a regression line representing this data on your calculator.
x: 5 6 7 8 9 10 11 12 13 14 15 16
y: 3 6 8 3 5 6 5 6 5 8 10 12
y=.5 +1.02x
100
What is the quadratic formula!?
x= -b +- sqrt(b^2 -4ac) over 2a
100
What is the probability that you roll at least 1 even number when roll a pair of dice?
27/36 or 3/4
100
It's a word used to describe two things that can't happen at the same time.
What is mutually exclusive?
200
It costs $300 to throw a party, and you are selling tickets to pay for the cost. Write a formula that shows how many tickets you'd have to sell depending on how much you charged per ticket.
y = 300/x
200
Draw a scatterplot that would have an r-value close to -0.5
Pointing downwards, only moderately strong.
200
What is the value of log(0.01)
-2
200
The probability that you are born in the US is 3/70. The probability that you are born male is 0.51.
What is the probability that you are male and born in the US?
0.02, or about 2%
200
It's the point on a quadratic you find when you set the function equal to zero and solve for x.
What is an x-intercept?
300
Consider the formula X=8A/B
As B increases what happens to X?
300
A person is studying the relationship between gpa and exercise and comes up with a regression line of:
GPA = 0.04H+2.6 where H is the hours of exercise a student gets each week.
If a student has a GPA of 3.0, how many hours would you predict that they exercise each week?
About 10 hours a week.
300
Solve for x:
0=x^2 - 7x +10
x = 5, 2
300
The probability of winning a game is 0.18.
How many times do you expect to have to play the game before you win?
About 6 times (5.5)
300
It is a variable that might make it SEEM like two events are related by cause and effect, even though they really aren't.
What is a lurking variable?
400
Solve this system of equations:
x+3y=-10
2x+2y=-4
(2, -4)
400
Name 4 of the 6 things we use to describe scatterplots.
There are 70 students in a class. 60 of them are taking math right now, and 26 are taking history. Only 2 students are not taking either.
How many students are taking BOTH math and history?
18 students.
400
It's a direct, indirect or multi-variable function that includes exponents.
What is a power function?
500
Draw two examples of graphs:
one EVEN inverse graph and one ODD direct graph
See graphs.
500
Describe what the phrase "correlation is not causation" means.
Just because two things seem strongly related doesn't mean one is actually causing the other - they might have a lurking variable.
500
A quadratic has x-intercepts at (6, 0) and (-2, 0). It's vertex is at (2, -32). What is the equation of the curve?
f(x) = 2(x - 6)(x + 2)
500
Volunteers Does not Volunteer Total
Has a Job 75 50 125
No Job 110 49 159
Total 185 99 284
What is the probability that a person volunteers given that they do not have a job?
110/159
500
Only using this idea can you raise 10 to a power and get an answer of 7.