U7L3 notes (8.3).notebook - Miss Kreke's Math...
Transcript of U7L3 notes (8.3).notebook - Miss Kreke's Math...
U7L3 notes (8.3).notebook April 26, 2017
Section 8.3 (page 415)
Slope and YIntercept
SlopeIntercept Form: The equation y=mx+b• m is the slope• b is the yintercept
Slope =
YIntercept: the point where the line crosses the yaxis
Example 1 Quick Check 1If you know two points of a line, you can find the slope of the line:
slope = =
Example 2: Find the slope of the line through
E(7,5) and F(2,0)
y2 y1x2 x1
difference in ycoordinatesdifference in xcoordinates
Example 3: A ramp slopes from a warehouse door down to a street. The function y= 1/5 x + 4 models the ramp, where x is the horizontal distance in feet from the bottom of the door and y is the height in feet above the street. Graph the equation.
Quick Check #2: Find the slope of the line through each pair of points.
a. (8, 1) and (0, 7)
b. (4, 3) and (10, 9)
U7L3 notes (8.3).notebook April 26, 2017
Quick Check #3: Graph each equation using slope and yintercept.
a. y = 2x 3
b. y = x + 4
Page 418
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#12 #13