270.Which of the following describes a possible
scenario?
a.The graph of a line with positive slope can
cross into both Quadrants II and IV.
b.The graph of a line with negative slope can-
not cross into both Quadrants I and II.
c.The graph ofy= c,where c≠0, can cross
into only two of the four quadrants.
d.The graph of a vertical line cannot cross into
both Quadrants II and III.
271.Which of the following describes a possible
scenario?
a.The graph ofx= c,where c≠0, cannot cross
the x-axis.
b.The graph ofy=c,where c≠0, must have a
y-intercept.
c.A line with an undefined slope can cross into
both Quadrant I and Quadrant II.
d.A line whose graph rises from left to right
has a negative slope.
272.Which of the following describes a possible
scenario?
a.A line whose equation is of the form y= –x+ c
can cross into three of the four quadrants.
b.A line with positive slope need not cross the
x-axis.
c.A line with negative slope need not cross the
y-axis.
d.A horizontal line has an undefined slope.
Set 18 (Answers begin on page 177)
This set focuses on more advanced properties of linear
equations, as well as more advanced word problems
modeled using linear equations.273.To which of the following lines is y= ^23 x–5
perpendicular?
a.y= ^23 x+ 5
b.y= 5 – ^23 x
c.y= –^23 x– 5
d.y= ^32 x–5
e.y= –^32 x+ 5274.The graphs of which of the following pairs
of linear equations would be parallel to
each other?
a.y= 2x+ 4,y= x+ 4
b.y= 3x+ 3,y= –^13 – 3
c.y= 4x+ 1,y= –4x+ 1
d.y= 5x+ 5,y= ^15 x+ 5
e.y= 6x+ 6,y= 6x– 6275.The line y= –2x+ 8 is
a.parallel to the line y= ^12 x+ 8
b.parallel to the line ^12 y= –x+ 3
c.perpendicular to the line 2y= –^12 x+ 8
d.perpendicular to the line ^12 y= –2x– 8
e.perpendicular to the line y= 2x– 8276.Which of the following is the equation of the
line perpendicular to y= ^34 x– 2 and passing
through the point (–6, 4)?
a.y= ^34 x+4
b.y= ^34 x– 4
c.y= ^43 x– 4
d.y= –^43 x– 4- LINEAR EQUATIONS AND INEQUALITIES–