1. Module 4 Topic 3 Writing Linear Equations

2. The equation for slope-intercept form is m is the slopeslope measures the steepness of the linem=-4/2=-2 b is the y-interceptb is where the line crosses the y-axis. Writing Linear Equations 2 -4

3. Write the equation of the line that has a slope of -4 and y-intercept of 5. Writing Linear Equations

4. Writing Linear Equations We use Point-Slope form, when we are given: a point and a slope!

5. Point Slope Form Write the equation of the line that passes through (-3,5) and has a slope of 2. What are we given? We are given the slope is 2! AND…we are given a point (-3,5). Final Answer

6. Point Slope Form Write the equation of the line that passes through (-3,5) and (-1,9) . Can we find the slope? Do we have enough info? What are we given? We are given 2 points, but no slope! Yes, we can use…

7. Point Slope Form Write the equation of the line that passes through (-3,5) and (-1,9) . Now that we know that the slope is 2, we can use either point to find the equation of the line.

8. Writing Linear Functions Summary When given the slope and y-intercept: y=mx+b. When given 1 point and the slope, do point slope: y – y1=m(x-x1). When given 2 points, and no slope, one must find the slope(m=y2-y1over x2-x1), then use either point for the point slope form. Now proceed to Mastery Assignments!