Write in Point Slope
What is the formula for point slope?
y-y1=m(x-x1)
What is the slope intercept formula?
y=mx+b
If you have two lines that are parallel what are their slopes going to be?
The slopes are equal.
Are these Parallel or Perpendicular?
y=4x - 8
y=-1/4x + 3
Perpendicular
(3, 9)
y-9=2(x-3)
m=3
(3, 1) (0, 10)
y=3x+10
If line a and b are perpendicular and the slope to line a is -2 what is the slope of line b?
The slope of line b is 1/2.
What is the equation of point slope?
y-y1=m(x-x1)
(2, 3) and (4, 7)
y-3=2(x-2) or y-7=2(x-4)
(2, -4) (0, -4)
y=0x-4
If line a has an equation of y=4x-9 and Line b has an equation of y=4x+25. Are the lines parallel or perpendicular.
Parallel
What is Slope Intercept Formula?
y=mx+b
line is parallel to y=-3x+3
(-3, 6)
y-6=-3(x+3)
Write in slope intercept of a line parallel to y=2x-9 and goes through (2, 9).
y=2x+5
Line a (1, 5) and (-2, 4)
Line b (3, 2) and (1, -4)
Are these line parallel, perpendicular or neither
Neither
What is the equation for slopes of two points?
A line perpendicular to y=-8x-9
(-2, 3)
y-3=1/8(x+2)
Write in slope intercept of a line perpendicular to y=1/3x+2 and goes through (0, 8)
y=-3x+8
Are these equations parallel, perpendicular, or neither?
y=1/3x-8
y=-3x-9
Perpendicular
Final Jeopardy
Line a is y=-5x-7
Line b is perpendicular to line a. What is line b's slope?
1/5