1. Slope – Intercept Form
What do all the points on the y-axis have in common?
What do all the points on the x-axis have in common?

2. Slope-Intercept Form of a Linear Equation
We can use the x- & y-intercepts (where the line crosses the x- & y-axes, respectively) to graph a linear equation:
2x + 3y = 6
Find the y-intercept by setting x = 0 & solving for y.
2(0) + 3y = 6  3y = 6  y = 2  (0,2) y-intercept
(2) Find the x-intercept by setting y = 0 & solving for x.
2x + 3(0) = 6  2x = 6  x = 3  (3,0) x-intercept
(3) Draw the line of the linear equations connecting the points (x-intercepts, 0) & (0, y-intercept).
Connect points (0,2) & (3,0) w/ a line.

3. Slope-Intercept Form of a Linear Equation
Slope-intercept form: y = mx + b,
where m = slope, b = y-intercept.
To find the slope-intercept form of a linear equation, given 2 coordinates:
(-3,1) & (2,-1)
Find slope of the line.
Slope = (y2 – y1) / (x2 – x1)
= [(-1) – (1)] / [(2) – (-3)]
= -2/5
(2) Use one of the coordinates to find y-intercept.
(-3,1)  1 = (-2/5)(-3) + b 
1 = 6/5 + b  b = 1 – (6/5) = -1/5
(3) Write equation using slope & y-intercept.
y = (-2/5)x + (-1/5) OR y = (-2/5)x – (1/5)

4. Classwork (HW if not completed in class)
Think & discuss – p. 552
Describe the line represented by the equation y = -5x + 3.
Give a real-life example with a graph that has a slope of 5 and a y-intercept of 30.
Classwork (HW if not completed in class)
p. 552 – ex (evens), 21, 22, 24, 26, 28-30