Download 4-6 Parallel Lines and Slope Intercept Form

Parallel/Perpendicular Lines in Slope Intercept Form Notes & Prac
Algebra 1
N____________
D______B_____
1.) Review: What are parallel lines?
2.) Parallel lines have the same _____________.
3.) Would vertical lines (x= ) be parallel? Explain.
4.) Would horizontal lines (y= ) be parallel? Explain.
5.) Circle the two lines that are parallel & identify the slope for each. Graph & label.
a.) y = 2x – 1
b.) y = -3x + 2
c.) y = 2x + 4
6.) Put in slope intercept form then circle the two lines that are parallel. Graph & label.
a.) -x + 2y = 6
b.) -2x + 4y = -4
c.) x + 2y = 4
Perpendicular Lines
1.) Review: What are perpendicular lines?
2.) Perpendicular lines slopes are _________________________________.
3.) Would vertical lines (x= ) and horizontal lines be perpendicular? Explain.
Practice
1.
2.
3.
4. Given the following equations of lines, tell whether the pairs are parallel,
perpendicular or neither.
a. line1 y = 3x – 4
line2 y = -3x – 1
b. line3 y = ½ x – 1
line4 2y = 4x + 3
a. line5 y = x + 5
line6 y = -x + 9
Parallel/Perpendicular Practice
Algebra 1
N_____________________
D____________B_____
Decide whether the graphs of the given equations are parallel, perpendicular or neither.
2.
2y = –4x – 6
3.
2x + 3y = 5
4. 4y = 3x – 20
&
&
&
4y – 2x = 8
Parallel Perpendicular Neither
9y + 6x – 1 = 0
Parallel Perpendicular Neither
–4x + 3y = –15
Parallel Perpendicular Neither