3.3 Slopes of Lines 3.4 Equations of Lines First & Last Name February 6, 2014 ______Block.

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Presentation transcript:

3.3 Slopes of Lines 3.4 Equations of Lines First & Last Name February 6, 2014 ______Block

1. Find the slope of the line that goes through the following points. a. (-1, 2) and (-3, -2) b. (-4, 0) and (0, -1)

c. (-3, 5) and (1, 5)d. (6, 3) and (6, -4)

The rate of change describes how a quantity is changing over time.

Parallel: Lines with the same slope Perpendicular: Product of two lines’ slopes is -1 (opposite reciprocal)

2. Determine whether AB and CD are parallel, perpendicular, or neither. a.A(-2, -5), B(4, 7), C(0, 2), D(8, -2) b.A(-8, -7), B(4, -4), C(-2, -5), D(1, 7)

Slope y-intercept

3. Write an equation in slope-intercept form of the line with slope of -4 and y-intercept of 1.

4. Write an equation in slope-intercept form of the line whose slope is -½ that contains (3, -7).

5. Write an equation in slope-intercept form of the line that passes through A(-1, 6) and B(3, 2).

7. Martina’s current cellular phone plan charges $14.95 per month and $0.10 per minute of air time. a.Write an equation to represent the total cost C for t minutes of air time. b.What will Martina’s cost be if she uses an average of 40 minutes of air time each month?

Exit Slip 1.Determine the slope of the line that contains A(-4, 3) and B(-2, -1). 2.Determine whether GH and RS are parallel, perpendicular, or neither. G(14,13), H(-11,0), R(-3,7), S(-4,-5)