Lessons 5.1 - 5.3 Notes: Writing the Equation of a Line
Review:

The general equation for slope-intercept form is _______________, where m is the
____________ and b is the _________________.

In order to be able to write the equation of a line, you need to know ______ and ______.
Steps:
1. If not given, find the slope
of the line using the formula
2. If not given, find the
3. Substitute the
y-intercept by substituting
slope
the slope and ordered pair
y-intercept
into
for
and
.
for
Then solve the equation for .
and .
Examples: Write the equation of the line in slope-intercept form.
1. Write the equation of the line whose slope is
and y-intercept is at
2. Write the equation of the line that crosses the y-axis at
.
and has a slope of
.
3. Write the equation of a horizontal line whose y-intercept is .
4. Write the equation of the line that passes through the point
into
and has a slope of
.
5. Write the equation of the line that has a slope of
and passes through
.
6. Write the equation of the line that passes through
and has an undefined slope.
7. Write the equation of the line that has an
and
.
8. Write the equation of the line that passes through the points
9. Write the equation of the line that passes through the points
.
.