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Section 2 - Slope-Intercept Form

Page history last edited by PBworks 16 years, 3 months ago

 

6.2 Slope - Intercept Form

 

linear equation: equation whose graph is a line

 

y = 2x + 5  <---Linear equation

 

y = 2eq=x^2 <---Not a Linear equation.  A linear equation cannot contain exponents, square roots, or absolute values.

 

 

 

slope - intercept form: y = mx + b

                                          m=slope

                                          b=y-intercept

 

Example: Identifying Slope and y-intercept

 

 

Find The slope and y-intercept of the line: y = 3x - 5

 

 

Think of y = 3x - 5 as y = 3x + (-5)

 

Slope = 3; y-intercept = -5

 

 

Example: Writing an Equation

 

Write an equation of the line with a slope 3 and y-intercpet 6

                                                                  8

 

y = mx + b   Use slope-intercept form

 

y = 3x + 6  Substitute 3 for m and 6 for y 

      8                            8

 

 

 

 

 

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