VOCABULARY
RATE OF CHANGE/SLOPE
DIRECT VARIATION
WRITING EQUATIONS OF LINES
PARALLEL AND PERPENDICULAR LINES
100
Ratio that describes, on average, how much one quantity changes with respect to a change in another quantity
What is Rate of change
100
Find the slope of a line that passes through (1,3) and (4,5)
What is 2/3
100
Name the constant of variation of the equation y = 3x
What is 3
100
Write an equation in slope intercept form of the line with a slope of 3 and y-intercept of -5
What is y = 3x - 5
100
Write the slope-intercept form of an equation for the line that passes through (-1,-2) and is parallel to the graph of y = -3x -2
What is y = -3x - 5
200
Slope of an horizontal line
What is zero
200
Find the slope of a line that passes through (1,-2) and (1,3)
What is undefined
200
True or False. The graph of a direct variaton always passes through the origin.
What is True
200
Write an equation of the line that passes through (-4,7) with slope -1.
What is y = -x + 3
200
Find the x and y intercept of the line 2x + 3y = -18.
What is x-intercept = -9 and y-intercept = -6
300
ratio of the change in the y-coordinates (rise) to the change in the x-coordinates (run)
What is slope of a line
300
Find the slope of a line 5x - 4y = 15
What is 5/4
300
Suppose y varies directly as x, and y = 28 when x = 7. Write the direct variation equation.
What is y = 4x
300
Which equation describes a line that contains points (-1,12) and (4,-8)
What is y = -4x + 8
300
Find an equation for the line that has a y-intercept of -2 and is perpendicular to the graph of 3x + 6y = 2
What is y = 2x - 2
400
Linear equation written in slope intercept form
What is y = mx + b
400
A chef cooks 10 lbs of chicken for 45 people and 30 lbs of chicken for 135 people. Find the rate of change for this situation.
What is 4.5 lbs per person
400
y varies directly as x, if y = 10 when x = 2, find the value of y when x = 14
What is 70
400
Write y = 2/3x + 7 in Standard form
What is 2x - 3y = -21
400
Tell whether the lines for each pair of equations are parallel, perpendicular, or neither. 7x - 4y = 4 and x - 4y = 3
What is neither, slopes are -3/4 and -1/4
500
Equation that describes a direct variaton
What is y = kx
500
Find the slope of a line that passes though the pair of points (1,7) and (10,1)
What is -2/3
500
If y = 12 when x = 15, find x when y = 21.
What is 26.25
500
Write and equation in point-slope form for the line through point (4,-6) and m = 3/5
What is y + 6 = 3/5 (x - 4)
500
Are the graphs of the lines parallel lines? y = 5x + 6 and -18x + 3y = -54
What No, since the slopes are different
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