# There are three ways in which we can solve for slope: Slope = RISE RUN 1. Use the formula and count the spaces on a graph. = 2323.

## Presentation on theme: "There are three ways in which we can solve for slope: Slope = RISE RUN 1. Use the formula and count the spaces on a graph. = 2323."— Presentation transcript:

There are three ways in which we can solve for slope: Slope = RISE RUN 1. Use the formula and count the spaces on a graph. = 2323

There are three ways in which we can solve for slope: Slope = y 2 - y 1 x 2 - x 1 2. Use the formula when you are giving two points on a line. = 4646 [ 3 - (-1)] [ 1 - (-5)] = = 2323

There are three ways in which we can solve for slope: 3. Use the equation of the line to determine the slope. 2323 = 2323 y = x + 7373 Slope

1. You are given the slope and the y-intercept. EXAMPLE: m = -2, b = 3 SOLUTION: Use the slope y-intercept form of the equation of a line. y = mx + b y = -2x + 3

2. You are given the slope and one point on the line. EXAMPLE: m = -2, A(-1,3) SOLUTION: Step 1: Find the slope Step 2: Find the y-intercept Step 3: Write the equation Step 1: You have the slope: m = -2 Step 2: Find the y -intercept y = mx + b (3) = (-2)(-1) + b 3 = 2 + b 3 - 2 = b 1 = b Step 3: Find Equation y = mx + b y = -2x + 1

= 3. You are given two points on a line. EXAMPLE: R(1,4), S(4,-2) SOLUTION: (-2 - 4) (4 - 1) -6 3 Slope RS = y 2 - y 1 x 2 - x 1 = = -2 Continued next slide Step 1: Find the slope Step 2: Find the y-intercept Step 3: Write the equation

3. You are given two points on a line. EXAMPLE: R(1,4), S(4,-2) SOLUTION: y = mx + b (1) =(-2)(4) + b 1= -8 + b 1 + 8 = b 9 = b Find y -intercept Step 1: Find the slope Step 2: Find the y-intercept Step 3: Write the equation Step 3: Find the equation y = mx + b y = -2x +9

CLASS WORK Finish Lesson 9(5) worksheet Check solutions to Lesson 9(5) Copy notes from this lesson. Do Lesson 10 worksheet

Download ppt "There are three ways in which we can solve for slope: Slope = RISE RUN 1. Use the formula and count the spaces on a graph. = 2323."

Similar presentations