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Section 4.3

Section 4.3. CPM. Your work in section 4.2 did not include writing a linear function in slope intercept form, but you can certainly do this. Example: Write the symbolic representation of the linear function with a slope of and y-intercept of –8.

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Section 4.3

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  1. Section 4.3 CPM

  2. Your work in section 4.2 did not include writing a linear function in slope intercept form, but you can certainly do this. Example: Write the symbolic representation of the linear function with a slope of and y-intercept of –8.

  3. It’s easy, RIGHT!!!!!!! But, what if we are not given the slope and y-intercept. Perhaps we’re given the slope and some other point on the line or just two points on the line. OH NO, what do we do? We can still use slope-intercept form ______________________. The slope is still m, and x and y can be replaced with the point (or either point if two are given). Now you just have to solve for the y-intercept (b)

  4. Recall: 2 lines are perpendicular iff ______________________________________. 2 lines are parallel iff _____________________________.

  5. Example: Write the symbolic representation of a linear function whose graph has the given characteristics

  6. contains the point (-3, 4) and parallel to –x+3y=150

  7. contains the point (-4,2) and perpendicular to x+4y=16 Perpendicular lines have the opprecip slope Now flip and switch the slope

  8. Write an equation of the line that passes through (4,6) and is parallel to the line that passes through (6,-6) and (10,-4) So, first we must find the slope of this line Now we can use this slope since they are parallel

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