WARM UP 4 SOLVING EQUATIIONS Solve the equation

WARM UP 4 SOLVING EQUATIIONS Solve the equation. (lesson 3. 3) 1. 2. 3. 4. 8+y=3 y– 9=2 6(x + 15) = 120 2(x + 5) =18

WARM UP SOLVING EQUATIIONS Solve the equation. 1. 2. 3. 4. 8+y=3 y– 9=2 6(x + 15) = 120 2(x + 5) =18 3 (lesson 3. 3)

WARM UP SOLVING EQUATIIONS Solve the equation. 1. 2. 3. 4. 8+y=3 y– 9=2 6(x + 15) = 120 2(x + 5) =18 2 (lesson 3. 3)

WARM UP SOLVING EQUATIIONS Solve the equation. 1. 2. 3. 4. 8+y=3 y– 9=2 6(x + 15) = 120 2(x + 5) =18 1 (lesson 3. 3)

WARM UP SOLVING EQUATIIONS Solve the equation. 1. 2. 3. 4. 8 + y CERTIFIED =3 y– 9=2 6(x + 15) = 120 2(x + 5) =18 0 (lesson 3. 3)

5. 4 Standard Form Wha two ‘spect in the nex 6 daze! 2/3 5. 4 b 2/4 5. 3 – 5. 4 Review 2/5 Quiz 2/6 5. 6 2/7 Unit 5 Review 2/10 Unit 5 Test

5. 4 Standard Form Today’s Schedule: • Lesson 5. 4 Powerpoint • In class assignment/homework GOAL: Write an equation of a line in standard form. KEY WORDS • Standard form • Slope-intercept form • Point-slope form • Integer • coefficient

5. 4 Standard Form STANDARD FORM The STANDARD FORM of an equation of a line is: Ax + By = C Where A and B are integers (not fractions) and not both zero.

5. 4 Standard Form EXAMPLE 3 Write an Equation in Standard Form A line intersects the axes at (4, 0) and (0, 3). Write the equation of the line in standard form. SOLUTION 1. Find the slope. y 2 – y 1 m= x 2 - x 1

5. 4 Standard Form EXAMPLE 3 Write an Equation in Standard Form A line intersects the axes at (4, 0) and (0, 3). Write the equation of the line in standard form. SOLUTION 2. Write an equation of the line using slope-intercept form. y = mx + b

5. 4 Standard Form EXAMPLE 3

5. 4 Standard Form PRACTICE Write in standard form an equation of the line that intersects the axes at (2, 0) and (0, 5)

5. 4 Standard Form HORIZONTAL AND VERTICAL LINES Recall from Lesson 4. 5 that the slope of a horizontal line is ZERO and the slope of a vertical line is UNDEFINED. In example 4 you will learn how to write equations of horizontal and vertical lines in standard form.

5. 4 Standard Form EXAMPLE 4 Equations of Horizontal and Vertical Lines Write an equation of the RED line in standard form. SOLUTION Each point on this horizontal line has a y-coordinate of -3. So, the Equation of the line is y = -3. This equation is in STANDARD FORM

5. 4 Standard Form EXAMPLE 4 Equations of Horizontal and Vertical Lines Write an equation of the RED line in standard form. SOLUTION Each point on this vertical line has a x-coordinate of 2. So, the Equation of the line is x = 2. This equation is in STANDARD FORM

5. 4 Standard Form PRACTICE Write an equation of the line in standard form.

5. 4 Standard Form PRACTICE Write an equation of the line in standard form.

5. 4 Standard Form YOUR TURN Page 295 #s 30 -44