2.3 Graph Slope­Intercept Form Day 1.notebook
August 24, 2016
2.3 & 2.4 Quick Graphs of Linear Equations
The slope intercept form of a linear equation is
y = m x + b.
slope
y­intercept
Aug 30­7:15 PM
To Graph Slope­Intercept Form
STEPS:
1) In slope­intercept form, label the slope and y­intercept
2) Plot the y­intercept on the y­axis.
3) Use the slope to find at least one more point
4) Connect the dots with a straightedge, making sure your line has arrows on it
Aug 30­7:25 PM
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2.3 Graph Slope­Intercept Form Day 1.notebook
August 24, 2016
Find the slope and y­intercept of the equation:
1) y = 2x + 4
2) y = ­3x + 8
3) y = ­x 4) y = 2x ­ 7
5) y = ¼x ­ 2
6) y = 2
Aug 30­7:28 PM
Using Slope to Locate a Point
a) Move from the y-intercept, NOT the origin.
b) Slope should be written as a fraction.
c) Numerator is the rise, moving up or down.
d) Denominator is the run, moving right or left.
EXAMPLES:
m = 2/3
m = -1/2
Aug 30­7:30 PM
2
2.3 Graph Slope­Intercept Form Day 1.notebook
August 24, 2016
Graph using slope­intercept:
1) y = 2x ­1
Aug 30­7:34 PM
Graph using slope­intercept:
2) y = ­x + 4
Aug 30­7:34 PM
3
2.3 Graph Slope­Intercept Form Day 1.notebook
August 24, 2016
Graph using slope­intercept:
3) y = ¾x
Aug 30­7:34 PM
Graph using slope­intercept:
4) y = ­¼x ­ 3
Aug 30­7:34 PM
4
2.3 Graph Slope­Intercept Form Day 1.notebook
August 24, 2016
Graph using slope­intercept:
5) y = 7
Aug 30­7:34 PM
Practice:
1. y = -2/5 x - 2
2. y = 1/2 x
3. y = -3
Aug 30­7:25 PM
5
2.3 Graph Slope­Intercept Form Day 1.notebook
August 24, 2016
Graph in 30 seconds or less!
Aug 30­7:34 PM
6