The type of correlation found in a scatterplot with a positive slope.
What is a positive correlation?
100
Find the intercepts of the graph 3x + 2y = -12.
What are x = -4 and y = -6?
200
The slope of the line in y - 3 = -2/3(x + 5).
What is m = -2/3?
200
Solve for y: ?3x + 4y = -8
What is y=-3/4x - 2
200
The type of correlation for a scatterplot when the points are randomly scattered.
What is no correlation?
200
Find the intercepts of the graph 4x + 2y = -8.
What are x = -2 and y = -4?
200
Cabby Cabs charges a fee of $5.00 plus $0.20 per mile to take a cab in NYC. What is the cost of taking the cab 12 miles?
What is $7.40?
300
The slope of the line passing through (5, 7) and (-2, 12)
What is m = -5/7?
300
Mr. Collins is constructing a fence around his property. He already has 25 sections up and plans to add 8 sections each Saturday until he is finished. Write an equation to find the total number of fence sections F standing after any number of Saturdays s.
What is F = 25 +8s?
300
What does a correlation coefficient r = 0.9 mean?
A strong, positive correlation.
300
Determine if the following relation a function. Why or why not?
{(3, 8), (2, 4), (3, 5), (0, 4)}
No, the x value 3 repeats.
300
The cost, C(m), of joining the sports center gym includes an initial membership fee of $95 plus a $35 monthly fee. Write an equation in slope-intercept form to find the total cost for m months.
Determine the cost for 5 months.
What is C(m) = 95 + 35m?
$270
400
The slope of a horizontal line.
What is m = 0?
400
Write in slope-intercept form 2x - 3y = 6.
What is y=2/3x - 2
400
Write an equation of the regression line in slope-intercept form using the years 3 and 6.
Age 1 2 3 4 5 6
Height 4 10 15 27 51 60
What is y = 15x - 30?
400
Is ?{(-2,1),(-1,8),(8,-2),(0,1),(1,-1)} ?a function?? Why? or Why not?
Yes, every input has exactly one output.
400
Find the y-intercept of the graph y = 4x - 7.
What is b = -7?
500
The slope of the line that passes through the points (9, 22) and (15, 36)
What is 7/3?
500
The equation of the line passing through the points (3, 1) and (2, 4).
What is y = -3x + 10
500
What are the steps for making a scatterplot on your calculator?
1) Enter data (#4)
2) Add new page for scatterplot (#5)
3) Add variables (x and y)
4) Get the line of best fit
500
The table of ordered pairs shows the coordinates of the two points on the graph of a function. Write an equation that describes the function.
x y
-2 2
4 -1
What is y = -1/2 x + 1?
500
Write a linear equation in slope-intercept form to model a tree 4 feet tall that grows 3 inches per year.