Point-Slope Formula.

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Presentation transcript:

Point-Slope Formula

Where m is the slope and b is the intercept What we Know so far…. Slope Intercept Form Where m is the slope and b is the intercept

What is the slope and y-intercept of each equation? Y= x + 3 Y= -5x +4

The New Stuff… Point- Slope Formula Point- Slope form is: Where m is the slope and (x1,y1) is the given point

Point Slope Formula A formula used to calculate the equation of the line algebraically. used when given the slope and 1 point.

I DO What is the equation of the line that passes through the points ( 2, 6) and (3, 7).

I DO Find the equation of the line between (14, 52) and (29, 97)

We Do ( -4, -7) and (0, 9) 2. (9, 8) and ( 12, 11)

You Do 1. ( -3, -6) and (20, 40)

Active Practice With your partner…play Tic-Tac-Toe! You both solve the problem. Player 1 chooses a problem and you both solve it in your notebook. If player 1 gets it right, they put an X on the answer. Player 2 can get the point (an O) if player 1 does not solve it correctly. If the answer isn’t in the grid then you move forward. Then Player 2 goes. Play until you get Tic-Tac-Toe and you get blackout between you and your partner!