Point-slope form:
y
−
2
=
−
3
x
+
12
Slope-intercept form:
y
=
−
3
x
+
14
Explanation:
First write a point-slope equation
y
−
y
1
=
m
(
x
−
x
1
)
, where
(
x
1
,
y
1
)
is the given point,
(
4
,
2
)
, and
m
is the slope,
−
3
.
y
−
2
=
−
3
(
x
−
4
)
y
−
2
=
−
3
x
+
12
For graphing, you can convert to the slope-intercept form,
y
=
m
x
+
b
, by solving for
y
, where
m
is the slope and
b
is the y-intercept.
Add
2
to both sides.
y
=
−
3
x
+
12
+
2
y
=
−
3
x
+
14
m
=
−
3
and
b
=
14
graph{y=-3x+14 [-10.72, 9.29, 7.66, 17.66]}
