3-8 Quiz The following questions are to help you decide if you understood today’s lesson. Please take time to see me if you do not get at least 2 questions right. Be sure to record your total on the portfolio sheet. TOMORROW is the journal check!

1. Is the line through points P(0, 5) and Q(–1, 8) parallel to the line through points R(3, 3) and S(5, –1)? Explain. No, the lines have unequal slopes. Yes; the lines are both vertical. Yes; the lines have equal slopes. No, one line has slope, the other has no slope. Non-Response Grid

2. Write an equation for the line parallel to y = –7x + 15 that contains P(9, –6). x + 6 = 7(y – 9) y + 6 = 7(x – 9) y – 6 = –7(x – 9) y + 6 = –7(x – 9) Non-Response Grid

Yes; their slopes are equal. Yes; their slopes have product 1. 3. Is the line through points P(0, –9) and Q(2, –8) perpendicular to the line through points R(1, 4) and S(3, 3)? Explain. Yes; their slopes are equal. Yes; their slopes have product 1. No, their slopes are not reciprocals. Yes; their slopes have product –1. Non-Response Grid

4. Write an equation for the line perpendicular to y = 2x – 5 that contains (–3, 6).   Non-Response Grid

5. Are the lines y = –x – 4 and 5x + 5y = 20 perpendicular? Explain. Yes; their slopes are equal. Yes; their slopes have product –1. No; their slopes are not equal No; their slopes are not opposite reciprocals. Non-Response Grid

3-8 p. 201-203 #8-42 even Journal check tomorrow! Assignment 3-8 p. 201-203 #8-42 even Journal check tomorrow!