1. Warm Up 10/11/18 1. Write the equation 2. Write the equation of
of the line that passes the line that passes through
through (-3, 4) with a (2,5) and (0,-4)
slope of 2.

2. Writing Equations in Point-Slope Form
Ch. 4-3
Writing Equations in
Point-Slope Form

3. Point-Slope Form y – y1 = m ( x - x1 )

4. ӿ Practice 1) Write an equation in point-slope form for
the line that passes through (3, -2) with a slope of 2, and then convert to slope-intercept form.
Step 1: Write the point slope form
Step 2: Plug in m, x1 and y1 into the equation.
Step 3: Solve for y
𝒚− −𝟐 =𝟐 (𝒙−𝟑) Distribute 𝟐 inside ()
- Subtract 2 from both
sides to isolate y.
y – y1 = m ( x - x1 )

5. YOU TRY!!
2) Write an equation in point-slope form for the line that passes through (-2, 1) with a slope of -6 and convert to slope-intercept form.

6. YOU TRY!!
2) Write an equation in point-slope form for the line that passes through (-2, 1) with a slope of -6 and convert to slope-intercept form.

7. Practice!!
3) Write in slope-intercept form an equation of the line that passes through the points (2,4) and (5,-2)
First Step: Find the slope
M= 𝒚𝟐−𝒚𝟏 𝒙𝟐−𝒙𝟏
Second Step: Identify x1, y1, and Slope (m)
x1= y1= m=
Third Step: Plug x1, y1, and m into point slope form and solve for y.
y – y1 = m ( x - x1 )

8. YOU TRY!!
4) Write an equation in point-slope form for the line that passes through the points (-4, 9) and (-5,8) and convert to slope-intercept form.

9. YOU TRY!!
4) Write an equation in point-slope form for the line that passes through the points (-4, 9) and (-5,8) and convert to slope-intercept form.