Line ab contains points a (1, 2) and b (−2, 6) the slope of line ab is
a)zero
b)undefined
c)positive
d)negative

the equation of line cd is (y−3) = − 2 (x − 4). what is the slope of a line perpendicular to line cd?
line cd contains points a (4, 6) and b (−2, 6). the slope of line cd is
line qr contains (2, 8) and (3, 10) line st contains points (0, 6) and (−2, 2). lines qr and st are
the equation of line qr is y = negative 1 over 2x + 1. write an equation of a line perpendicular to line qr in slope-intercept form that contains point (5, 6).
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).

line qr contains (2, 8) and (3, 10) line st contains points (0, 6) and (−2, 2). lines qr and st are

parallel because the product of the slopes is −1

perpendicular because the product of the slopes is −1

parallel because the slopes are the same

perpendicular because the slopes are the same

question 2

(06.02 lc)

the equation of line cd is (y−3) = − 2 (x − 4). what is the slope of a line perpendicular to line cd?

1 over 2

2

negative 1 over 2

−2

question 3

(06.02 lc)

line cd contains points a (4, 6) and b (−2, 6). the slope of line cd is

zero

undefined

positive

negative

question 4

(06.02 mc)

the equation of line qr is y = negative 1 over 2x + 1. write an equation of a line perpendicular to line qr in slope-intercept form that contains point (5, 6).

y = 2x + 16

y = negative 1 over 2x + 17 over 2

y = − 1 over 2x + 7 over 2

y = 2x − 4

question 5

(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).

y = −2x + 13

y = negative 1 over 2x + 7

y = 1 over 2x + 3

y = − 2x − 3