Slope-Intercept  y=mx+b  b=y-intercept  m=slope Point Slope  y- y ₁ =m(x-x ₁ )

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Presentation transcript:

Slope-Intercept  y=mx+b  b=y-intercept  m=slope Point Slope  y- y ₁ =m(x-x ₁ )

Slope-intercept (Make it a y=mx+b equation) o x-3y=6 Subtract x o -3y=6-x Divide by -3 o y=1/3x-2 ( y=mx-2) Plug in o -1=m(5)-2 Multiply o -1=5m -2 Add 2 to both sides o 1=5m Divide by 5 o m=1/5 y= ⅕ x-2 (page 332, number 29) Textbook

Slope Intercept o 2x=3y-1 Add o 2x+1=3y Divide o y=⅔x+⅓ ( y=⅔x+b) o -5= ⅔(8)+b Simplify o -5=16/3+b Subtract o -31/3=b y=⅔x-31/3 (Page 332, Number 31) Textbook

Point Slope x-3y=6 o Subtract x -3y=6-x o Divide by -3 y=1/3x-2 ( y=mx-2) o Plug in variables -1=m(5)-2 o Simplify -1=5m-2 o Add 1=5m o Divide m=1/5 y-y ₁ =m(x-x ₁ ) o Plug in y-(-1)=1/5(x-5) o Simplify y+1= ⅕ x-1 o Subtract y= ⅕ x-2 (Page 332, Number 29) Textbook

o Point Intercept 2x=3y-1 o Add 2x+1=3y o Divide y= ⅔ x+ ⅓ ( y= ⅔ x+b) y-y ₁=m(x-x₁) o Plug in y-(-5)= ⅔(x-8) o Simplify y+5=⅔x-16/3 o Subtract 5 on both sides  y=⅔x-31/3 (Page 332, Number 31) Textbook