page 218 #21 Write an equation of a line in slope-intercept form with a slope of 3 and a y-intercept of -4.
What is y=3x - 4
100
page 227 #13 Write an equation of the line that passes through the point and has the given slope. (7, 1), slope 8
What is y=8x-55
100
page 234 #15 Write an equation of the line in point-slope form. (-2, 11), m=4/3
What is y - 11= 4/3(x + 2)
100
What is special about the slope of two parallel lines?
What is same slope
100
When is it appropriate to use the terms ASSOCIATION and CORRELATION?
Association -- any pattern between two variables
Correlation -- linear patterns only
200
page 218 #26 Graph. y = 8x - 7
What is y-int=-7, slope up 8 right 1
200
page 227 #15 Write an equation of the line that passes through the point and has the given slope. (2, 6), slope 2
What is y = 2x+2
200
page 234 #19 Write in standard form. y - 10 = 2(x - 8)
What is 2x - y = 6
200
What is special about the slope of two perpendicular lines?
What is opposite reciprocal
200
Which correlation value indicates the strongest linear association? Why?
r = -0.84 or r = 0.75
r = -0.84 because it's absolute value is closer to 1
300
page 218 #27 Graph. 5x + 2y = 8
What is y = -5/2 + 4. y-int= 4. slope = down 5, right 2
300
page 227 #17 Write an equation of the line that passes through the pair of points. (-2, 5), (5, -2)
What is y= -x +3
300
page 234 #25 Write in standard form. 2y + 3 = -1/3(x - 2)
What is x + 6y = -7
300
page 241 #15 Write an equation in slope-intercept form for the line that passes through the given point and is parallel to the graph of the given equation. (-2, 3), y = -3/4 + 4
What is y = -3/4 + 3/2
300
Describe the association (shape, strength, direction)
moderately strong negative linear association
400
see page 219 #35. Write an equation in slope-intercept form for the graph.
What is y = 1/2x - 3
400
page 227 #21 Write an equation of the line that passes through the pair of points. (-2, -4), (2, 4)
What is y=2x
400
page 234 #29 Write in slope-intercept form. y + 5 = -6(x +7)
What is y = -6x -47
400
page 241 #25 Write an equation in slope-intercept form for the line that passes through the given point and is perpendicular to the graph of the given equation. (-4, 5), y = 1/3x + 6
What is y = -3x - 7
400
The regression equation for the set of data: (19, 410), (31, 580), (34, 590), (35, 570), (39, 640), (39, 680), (43, 660)
What is y = 11.06x + 210.95
500
page 219 #51 a. Tution at Chicago State University is $157 per credit hour. Fees cost $218 per year.
Write an equation in slope-intercept form for the tuition T for c credit hours.
What is T = 157c + 218
500
The equation of the line with slope of 0 and goes through the point (3, 5)
What is y=5
500
page 234 #33 Write in slope-intercept form. y + 3 = -1/3(2x + 6)
What is y = -2/3x - 5
500
Line AB contains the points (4, 1) and (3, 6). Line CD contains the points (2, -1) and (1, 4).
Are these two lines parallel?
What is yes
500
The r value for the regression equation that models the data: (19, 410), (31, 580), (34, 590), (35, 570), (39, 640), (39, 680), (43, 660)