Line AB contains points A (1, 2) and B (−2, 6). The slope of line AB is (4 points)
a
zero
b
undefined
c
positive
d
negative
Question 2 (4 points)
(06.02 MC)
Line AB contains (0, 4) and (1, 6) Line CD contains points (2, 10) and (−1, 4). Lines AB and CD are (4 points)
a
parallel, because the slopes are the same
b
perpendicular, because the slopes are the same
c
parallel, because the product of the slopes is −1
d
perpendicular, because the product of the slopes is −1
Question 3 (4 points)
(06.02 LC)
The equation of line AB is (y−3) = 5 (x − 4). What is the slope of a line perpendicular to line AB? (4 points)
a
−5
b
5
c
negative 1 over 5
d
1 over 5
Question 4 (4 points)
(06.02 MC)
The equation of line CD is y = −2x − 2. Write an equation of a line parallel to line CD in slope-intercept form that contains point (4, 5). (4 points)
a
y = −2x + 13
b
y = negative 1 over 2 x + 7
c
y = negative 1 over 2 x + 3
d
y = −2x − 3
Question 5 (4 points)
(06.02 MC)
The equation of line QR is y = negative 1 over 2 x + 1. Write an equation of a line perpendicular to line QR in slope-intercept form that contains point (5, 6). (4 points)
a
y = 2x + 16
b
y = negative 1 over 2 x + 17 over 2
c
y = − 1 over 2 x + 7 over 2
d
y = 2x − 4