1. Section 1.4
Lines
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2. If y1 = y2, L is a horizontal line and the slope = 0.
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3. = Average Rate of Change
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4. Order doesn’t matter
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5. Proving order doesn’t mater
Find the slope of the line containing the points (-1, 4) and (2, -3).
The average rate of change (slope) of y with respect to x is
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7. # 11) Find the slope of the line and interpret the slope. (2,1) (0,0)
Practice:
# 11) Find the slope of the line and interpret the slope.
(2,1)
(0,0)
# 17) Plot each pair of points and determine the slope of the line containing them. Graph the line by hand.
(-2,3); (2,1)
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8. There is only one negative sign it can go with the 4 or the 5 not both-4 -5
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9. Graph the equation: x = –2 x = a is always a vertical line
a is the x intercept
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12. Find the equation of a line with slope –3 and containing the point (–1, 4).
Run = 1
Rise = -3
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13. Find an equation of the line L containing the points (–1, 4) and (3, –1). Graph the line L.
(-1, 4)
(3, -1)
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15. Find the slope m and y-intercept b of the equation 3x – 2y = 6
Find the slope m and y-intercept b of the equation 3x – 2y = 6. Graph the equation.
Change to
(0, -3) 2
(2, 0) 3
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17. Graph the linear equation 3x + 2y = 6 by finding its intercepts.
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23. Find the slope of a line perpendicular to a line with slope .
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