NOTES: GRAPHING USING NOTES: GRAPHING USING SLOPE & Y-INTERCEPTSLOPE & Y-INTERCEPT

DAY 2DAY 2

STEPSSTEPS

REWRITE IN SLOPE INTERCEPT FORM REWRITE IN SLOPE INTERCEPT FORM

(Y = MX+B)(Y = MX+B) LABEL SLOPE (M) AND Y-INTERCEPT LABEL SLOPE (M) AND Y-INTERCEPT

(B)(B) PLOT Y-INTERCEPTPLOT Y-INTERCEPT USE SLOPE TO FIND FOUR OTHER USE SLOPE TO FIND FOUR OTHER

POINTS (TWO ABOVE * TWO BELOW) & POINTS (TWO ABOVE * TWO BELOW) & CONNECT THE DOTSCONNECT THE DOTS

EXAMPLE #1EXAMPLE #1 GRAPH GRAPH 2 1X Y STEP 1: Put in Y = MX + B

-2X + Y = 1

+2x 2X

Y = 2X + 1

STEP 2: 2 1Y X STEP 3: PLOT THE Y-INTERCEPT

STEP 4: USE SLOPE TO PLOT FOUR OTHER POINTS – TWO ABOVE AND TWO BELOW THE Y-INTERCEPT & CONNECT THE DOTS

2 22

1 1m

EXAMPLE #2EXAMPLE #2 GRAPH GRAPH 12 4 12X Y STEP 1: Put in Y = MX + B

12X + 4Y = 12

-12x -12X

4Y = -12X + 12

STEP 2: 3 3Y X

STEP 3: PLOT THE Y-INTERCEPT

STEP 4: USE SLOPE TO PLOT FOUR OTHER POINTS – TWO ABOVE AND TWO BELOW THE Y-INTERCEPT & CONNECT THE DOTS

3 33

1 1m

Example #3Example #3Try on your own!Try on your own! GRAPH Y – 2 = 0GRAPH Y – 2 = 0

REMEMBER THIS REMEMBER THIS MEANS Y = 0X + 2MEANS Y = 0X + 2

STEP 1: Put in Y = MX + B

Y = 2

STEP 2:

EXAMPLE #4EXAMPLE #4Try on your own!Try on your own! GRAPH GRAPH 2 2X Y STEP 1: Put in Y = MX + B

X + 2Y = -2

-x -X

2Y = -X - 2

STEP 2:

STEP 3: PLOT THE Y-INTERCEPT

STEP 4: USE SLOPE TO PLOT FOUR OTHER POINTS – TWO ABOVE AND TWO BELOW THE Y-INTERCEPT & CONNECT THE DOTS

1 1 1

2 2 2m

12

1 xy