X = 4 On Desk: Pencil Math Journal Learning Log Quiz & Sig.?

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Presentation transcript:

X = 4 On Desk: Pencil Math Journal Learning Log Quiz & Sig.? Math CC7/8 – Be Prepared On Desk: Pencil Math Journal Learning Log Quiz & Sig.? Learning Log: HW: MSA p. 98, #2-6, 7a-b, #8-12, #50-52 Return MSA Quiz/Cover Sheet- Fri. 1/5 Test Monday 1/8 and Tues 1/9 Solve and check: 2(x + 5) = 18 X = 4

Tasks for Today Absent Students? Quiz, Partner Quiz? Pass Back MSA Quiz Lesson 4.2 – Finding the Slope of a Line

The dependent variable The independent variable Define all the parts of the equation. y = mx + b The dependent variable Y- intercept The independent variable Slope

How do you find the slope from… a graph? Rise (vertical change) Run (horizontal change) a table? As x goes up by 1, what happens to y? Change in y divided by change in x an equation? The coefficient (the number next to the variable)

Y = 6 - 3x Y = 3x + 6 Y-intercept = 6 Y-intercept = 6 Slope = Rise = Run -3 1 3 1 Slope = Rise = Run Y = 6 - 3x Y = 3x + 6

Y = 1.5x - 1 Y = -0.5x + 5 3 Y-intercept = -1 2 -0.5 Y-intercept = 5 1 Slope = Rise = change in Y = Run change in X Y-intercept = -1 Y = 1.5x - 1 -0.5 1 Y-intercept = Slope = Rise = change in Y = Run change in X 5 5 Y = -0.5x + 5

Y-intercept = 5 Y-intercept = 20 Slope = coefficient of x Slope = Slope = coefficient of x Slope = -3 2.5

-1 (4, 4) (5, 3) (6, 2) Make a table? Graph the points? Or calculate the change in y divided by the change in x Slope = Rise = change in Y = Run change in X (4, 4) (5, 3) (6, 2) Use the table to find 2 more points? Find the y-intercept , write the equation, use substitution?

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A graph? Rise (vertical change) Run (horizontal change) A table? As x goes up by 1, what happens to y? Or the change in y divided by the change in x An equation? It is the coefficient (the number next to the variable)