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Direct Variation
Finding Slope
Writing Linear Equations
Absolute Value Functions
Functions
100
Is the equation a direct variation equation? y = 4x + 2
No
100
What is the slope of the line? y = -2x + 17
-2
100
Write the equation in point slope form. y - y1 = m (x - x1) through ( 5, -3) with slope = 2
y + 3 = 2(x - 5)
100
Write the equation of the absolute value function that has moved 2 units left.
y = l x + 2 l
100
Is this a function? (1, 1) (0, 2) (1, 3)
No
200
Is the equation a direct variation equation? y = .5x
Yes, k = .5
200
What is the slope of the line? 2x + 3y = -8
-2/3
200
Write the equation in point slope form. y - y1 = m (x - x1) through ( 4, 3) and (6,4)
y - 3 = 1/2 ( x - 4)
200
Write the equation of the absolute value function that has moved 4 units down and 3 units right.
y = l x - 3l - 4
200
Is this a function? (2, 2) (3, 2) (4, 5) (6, 7)
Yes
300
If k = 4, find y when x = 10.2.
40.8
300
What is the slope of the line? -2x + 4y = 10
2/4 or 1/2
300
Write the equation of a line parallel to y = -2/3x + 7 with a y-intercept at 3.
y = -2/3x + 3
300
Write the equation of the absolute value function that has been reflected over the x axis, vertically stretched by a factor of 2 and shifted up 6.
y = -2lxl + 6
300
What is the range of the function with the given points. (2, -4) (-5, 6) (-3, 8) (4, 1) (0, 0)
-4, 6, 8, 1, 0
400
If x = 2 when y = -8, find y when x = 6.
y = -24
400
What is the slope of the line? (-4, 5) (6, 12)
7/10
400
Write the equation of a line perpendicular to the line y = 3x - 1 with a y-intercept at -5.
y = -1/3x - 5
400
Find the vertex of the absolute value function. y = l5x - 15l + 2
(3, 2)
400
What is the test used to verify if a graph is a function?
vertical line test
500
If x = 3 when y = 15, find x when y = 45.
x = 9
500
What is the slope of the line? ( -3, -9) (-5, -1). Your answer must be simplified!
8/-2 = -4
500
Write the equation of line with undefined slope through the point ( 6, -3).
x = 6
500
Find the vertex of the absolute value function. y = lx - 6l - 8
(6, -8)
500
Given f(x) = 5x - 16, find f(-3)
-31