1. Graphing lines:Graphing lines:
y=mx + by=mx + b
Algebra 1 – Summer 2013Algebra 1 – Summer 2013
Mr. SaucedoMr. Saucedo

2. OBJECTIVEOBJECTIVE
 Today we will learn to:Today we will learn to:
 Graph lines by looking at an equation of the formGraph lines by looking at an equation of the form
y=mx + b.y=mx + b.

3. y = mx + by = mx + b
What do the letters mean?What do the letters mean?
This equation is called:This equation is called: slop-intercept form equation.slop-intercept form equation.

4. How do we graph an equationHow do we graph an equation
y = mx + b?y = mx + b?
1.1. Find the values forFind the values for mm andand bb..
2.2. PlotPlot bb on your graph.on your graph.
3.3. Find the next point on your graph usingFind the next point on your graph using mm..

5. Guided PracticeGuided Practice
 Graph the line of the equation y = 3x – 2.Graph the line of the equation y = 3x – 2.

6. Guided practice 2Guided practice 2
 Graph the line of the equation: y = -x + 4Graph the line of the equation: y = -x + 4

7. Guided Practice 3Guided Practice 3
 Graph the line of the equation: y = (-1/3)x -1Graph the line of the equation: y = (-1/3)x -1

8. Guided practice 4Guided practice 4
 Graph the line of the equation: y = xGraph the line of the equation: y = x

9. Guided practice 5Guided practice 5
 Graph the line of the equation y = 4xGraph the line of the equation y = 4x

10. Guided Practice 6Guided Practice 6
 Graph the line of the equation: 2x + y = 6Graph the line of the equation: 2x + y = 6

11. Guided practice 7Guided practice 7
 Graph the line of the equation y -5 = -xGraph the line of the equation y -5 = -x

12. Independent PracticeIndependent Practice
 Graph the lines to the following equations.Graph the lines to the following equations.
1.1. y = -3x + 2y = -3x + 2
2.2. y = (1/5)x – 6y = (1/5)x – 6
3.3. y = -xy = -x
4.4. 4x + y = -34x + y = -3