Lesson 3-6: More Equations of Lines

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Presentation transcript:

Lesson 3-6: More Equations of Lines Objective Students will: Write equations given two points State the slope and y-intercept from an equation Graph linear equations Find the standard form of equations

Example 1: Find the slope and y-intercept of y = 6x + 9 b=???? (0, ?) This should be an easy one!!!

Example 2: Find the slope and y-intercept of 6x + 2y = 24 Hint: Solve for y, then like Ex 1 m=???? b= ????? (0,?) Remember equations like Ax + By =C are called standard form. (no fractions and A is positive) The slope is given as m = . Why????

Example 3: Write 2x + 8 = 5y in standard form

Example 4: Write the equation of the line through (3,1) and (5, 7) 2 choices a) point-slope or b) slope intercept Both require SLOPE!!!!!! Which we do not have!!!! Find the slope m= ??? then complete using a) and b) from yesterday’s notes (Make sure to pick only one point to substitute –doesn’t matter which can be same one in both methods) a) b)