y = mx + b.
2-4 Writing Linear Equations
CCSS PERSEVERANCE Write an equation in
5. MULTIPLE CHOICE Which is an equation of the
slope-intercept form for the line that satisfies
line?
each set of conditions.
6. passes through (–9, –3), perpendicular to
SOLUTION:
The slope of the line
is
. The slope
of the line perpendicular to the given line is
.
A
B
Substitute m =
and
in the point
slope form
.
C
D
SOLUTION:
Substitute
and
in the slope formula
.
7. passes through (4, –10), parallel to
SOLUTION:
The slope of the line
is . The slope of
Substitute m = –4 and
in the point
slope form
the line parallel to the given line is
.
Substitute m =
and
in the point
slope form
.
CCSS PERSEVERANCE Write an equation in
slope-intercept form for the line that satisfies
each set of conditions.
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6. passes through (–9, –3), perpendicular to