1. y=mx + b 4.3 Linear Equations Slope-Intercept Form y = 2x - 5
m = slope
and b = y-intercept (where the line crosses the y-axis)
y = 2x - 5
slope = 2 and the y-intercept = -5
m = -2/3 and b = 7

2. Write an equation given m and b.
If m = 4 and b = -2,
write the equation in slope-intercept form.
y = 4x -2
Try this one: slope is ¼ and y- intercept is -6.

3. Writing an equation from a graph
Try Example 2 Check your Progress on page 205
y = ¼x -1

4. Graphing y = mx + b 4 is the y-intercept. Figure out b. Graph it
Figure out m.
Use it to graph another point
Draw a line.

5. Write in y = mx + b form and then determine the slope and y-intercept.
2x + 5y = 10
- 2x
- 2x
5y = -2x + 10
m = -2/5 5 5 5
b = 2

6. Graph in standard form.
You can use the cover method or you can change it to slope intercept form and graph it using b and m.

7. 3x + 4y = 12 4 3 Cover up method! Cover up 4y. What does x equal?
Plot it on the x-axis.
Cover up 3x. x
What does y equal? 3
Plot it on the y-axis.
Then use a straightedge
and draw the line!

8. (Bank, Silver Dollar, Grape)
Slope-intercept form
3x + 4y = 12
4y = - 3x +12
y = - 3/4x + 3
b = 3
m = -3/4
Homework #29
Worksheets
(Bank, Silver Dollar, Grape)