1. Bellringer

2. Chapter 6: Section 2
Slope-Intercept Form

3. Linear Equation Any equation whose graph is a line
Since a function rule can form a line, a function can be linear
f(x) = 2x + 5

4. Y-Intercept Represented by the variable b
The y-coordinate of the point where the line crosses the y-axis
Graph y = 2x + 5 to see where is crosses the y-axis. What is its slope?

5. Slope-Intercept Form
y = mx + b
m = slope
b = y-intercept

6. Find the slope and y-intercept
y = 3x – 5
y = x + 1
y = (2/3)x – 3
y = -2x

7. Write an equation of the line from the given slope and y-intercept.
m = 2/9 b = 3
m = 0 b = 1
m = -1/4 b = -2
m = 3 b = 0

8. Write the slope-intercept form from the graph of the equation

9. Use the slope and the y-intercept to graph the equation
y = ½ x +4
y = 2x +5
y = -3/2 x

10. Assignment
Page 294
Numbers 3-39 multiples of 3
Number 40