41 graphing equations in slopeintercept...
TRANSCRIPT
Algebra 41 Lesson with notes 2nd a.notebook
1
October 29, 2015
Oct 208:00 PM
41 Graphing Equations in SlopeIntercept Form
Learning Targets:I can write and graph linear equations in slopeintercept formI can model realworld data with equations in slopeintercept form
How many songs could Jamil have on his digital media player after two months?
How many songs could he have after four months?
Would a graph of the equations y = 30x + 500 have a positive or negative slope?
Oct 289:53 AM
Algebra 41 Lesson with notes 2nd a.notebook
2
October 29, 2015
Oct 2810:07 AM
Oct 2810:15 AM
Algebra 41 Lesson with notes 2nd a.notebook
3
October 29, 2015
Oct 2810:21 AM
Oct 208:05 PM
Slopeintercept form of an equation: y = mx + b where m is the slope and b is the yintercept
Algebra 41 Lesson with notes 2nd a.notebook
4
October 29, 2015
Oct 208:09 PM
Oct 208:10 PM
Example 1:
1. Write an equation of the line in slopeintercept form with the slope of 1/4 and a yintercept of 1. Then graph the line.
Write and equation of the line in slope intercept form with the given slope and yintercept. Then graph the equation.
2. slope = 1/2, yintercept = 3 3. slope = 3, yintercept = 8
Algebra 41 Lesson with notes 2nd a.notebook
5
October 29, 2015
Oct 208:13 PM
One of the quickest ways to graph is by the slopeintercept form of an equation. Get the y by itself.
Oct 208:19 PM
Graph each equation using yintercept form.
4. 5x + 4y = 8 5. 3x 4y = 12 6. 2x + 5y = 10
Algebra 41 Lesson with notes 2nd a.notebook
6
October 29, 2015
Oct 2510:06 PM
Constant functions: y = b, a horizontal line. They do not cross the xaxis (except for y = 0 which is the xaxis). Slopeintercept form is y = 0x + b, where b is any number.
To graph these functions: go to the axis given and put a dot at the number given, then draw a line perpendicular to that axis
(this works for horizontal or vertical lines)
Graph.7. y = 7 8. y = 5 9. 2y = 1 10. x = 5
Oct 2510:18 PM
To write an equation from the graph: Count the slope, m = ?, then find the yintercept, b = ? Fill in the m and b in the formula y = mx + b.
11. Write an equation of the line in slopeintercept form for the line shown in the graph.
Algebra 41 Lesson with notes 2nd a.notebook
7
October 29, 2015
Oct 2510:23 PM
12. Write an equation of the line in slopeintercept form for the graph of the line.