CONVERTING STANDARD FORM TO SLOPEINTERCEPT FORM Ms Linwood
- Slides: 14
CONVERTING STANDARD FORM TO SLOPEINTERCEPT FORM Ms. Linwood Algebra I Roosevelt High
STANDARD FORM WHAT’S DIFFERENT ABOUT THESE TWO EQUATIONS? y = -3 x + 4 6 x + 2 y = 8
EX. 1: add/subtr x term divide by the # in front of y 2 Y + 4 X = 8 -4 x 2 y 2 -4 x = -4 x+ 8 2 2 y = -2 x+4 y = ___x + ___
CONTINUE EX 1: 2 Y + 4 X =8 y = -2 x+4 y-int = ___ Slope=___
EX. 2 Add or subtr. x-term 2 y + 4 x = 8 3 y – 12 x = 9 EX. 3 3 y + 4 x = 24 -4 x + 12 x +12 x - 4 x -4 x 2 y = -4 x + 8 3 y = 12 x + 9 3 y = -4 x + 24 -- -- --Mult. / div. -- --3 3 3 by # 2 2 2 in front y = -2 x + 4 y = 4 x + 3 y = -4/3 x + 8 of Y Identify slope and y-int Slope = -2 Y-int = 4 Slope = -4/3 Y-int = 8
EX. 4 Add or subtr. x-term EX. 5 6 x+4 y = 12 -5 x+15 y=-30 7 x– 14 y= 21 -6 x - 7 x -6 x + 5 x +5 x 4 y = -6 x+12 15 y=5 x – 30 -- --Mult. / div. -- --15 15 15 by # 4 4 4 in front y = -3/2 x+3 y = 1/3 x – 2 of Y Identify slope and y-int EX. 6 -7 x -14 y= -7 x + 21 -- ---14 -14 y = ½x + -3/2 Slope = 1/3 Slope = ½ Slope= -3/2 Y-int = 3 Y-int = -2 Y-int = -3/2
REVIEW FOR TEST: SLOPE #1 Write the x-intercept 3 as a coordinate point #2 Write the y-intercept -7 as a coordinate point
#3 What are the coordinate pairs : x-intercept of 9 and y-intercept of 6
#4 What is the x- and y-intercept of 2 x + 3 y = 24?
#5 Convert into slope intercept form. 2 x + 3 y = 24 Find slope and y-intercept.
#6 What is the x and y-intercepts of 3 x - 5 y = 30?
#7 What are the x and y intercepts of -4 x + 6 y = -12
#8 Convert to slope-intercept form. 4 x – 2 y = 12
#9 What are the x- and y- intercepts of 2 y – 3 x = 6
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