Lesson 7 slope intercept form.notebook
February 08, 2016
Lesson 7 (PH Text 5.3): Slope­Intercept Form y=mx+b
Objective: to write linear equations using slope intercept­form to graph linear equations in slope intercept­form
Parent Function – the simplest function with certain characteristics
Linear Parent Function – the simplest linear function – y = x
Linear Equation – an equation that models a linear function – the highest power of x in a linear function is 1
y­intercept – the y­coordinate of a point where the graph crosses the y­axis
Feb 2­8:26 AM
Classwork:
pg. 310
#'s 7-27 odd
Feb 8­8:56 AM
1
Lesson 7 slope intercept form.notebook
February 08, 2016
Rewrite an equation if it is not in slope­intercept form. Then graph the line.
Rewrite ­5 = 4x – y so it is in y = mx +b form.
Feb 2­8:36 AM
Re­write: Feb 2­8:38 AM
2
Lesson 7 slope intercept form.notebook
February 08, 2016
Homework:
pg. 310
37­40 all
Feb 2­8:42 AM
To write an equation for a line from a graph, get the slope and y­intercept from the graph and substitute into the form y = mx +b.
1. Find the y­intercept.
b = _____
2. Find the slope using two points.
m = _____
3. Substitute into y = mx + b to write the equation for the line
Feb 2­8:41 AM
3
Lesson 7 slope intercept form.notebook
February 08, 2016
Write the equation of the line.
Feb 2­8:47 AM
Write the equation of the line.
Feb 2­8:48 AM
4
Lesson 7 slope intercept form.notebook
February 08, 2016
To Write the equation from two points:
1. Find the slope using the slope formula
m=
2. Use the slope and the coordinates of ONE point to solve for b.
3. Substitute the slope an the y-intercepts into the slope
intercept form.
Feb 2­8:51 AM
Write the equation of the line that passes through the points (1, 4)
and (3, 10).
Feb 2­8:54 AM
5
Lesson 7 slope intercept form.notebook
February 08, 2016
Write the equation of the line that passes through the points (2, 1)
and (5, -8)
Feb 2­8:55 AM
Write the equation of the line that passes through the points
(3, -2) and (1, -3).
Feb 2­8:55 AM
6
Lesson 7 slope intercept form.notebook
February 08, 2016
pg. 310
#'s 22 -36 even
Feb 2­8:56 AM
7