September 26, 2016
2.3 Linear Functions and Slope Intercept Form
Remember Algebra I?
The graph of a line has these
characteristics:
1.) Slope
2.) y-intercept
Slope =
y-intercept =
What is the equation of this line?
September 26, 2016
What is are some differences between the first 3 lines and the vertical line?
The vertical line:
1.) Is not a function
2.) Has no slope (or undefined)
3.) Has no y-intercept (except for x = 0)
September 26, 2016
Calculate the slope passing through the following points...
(you can rely on your calculator to do the heavy work!)
x-intercept- the point where a line crosses the x-axis. (x,0).
y- intercept- the point where a line crosses the y-axis. (0,y)
(also...the b value in slope-intercept form)
September 26, 2016
Write an equation for each line.
1.) m=6 and the y-intercept is (0,-5).
2.) m = 0 and the y-intercept is (0,4)
3.)
September 26, 2016
Write each equation in slope-intercept form.
"Solve for y"- easy to graph a line
that is solved for
y!
1.)
2.)
September 26, 2016
What is the slope and y-intercept of each equation?
think... y=0x+4
1.)
2.)
Think...there is no y! that only
happens for vertical lines...
3.)
m=
m=
m=
b=
b=
b=
September 26, 2016
Graph the equation.
1. Solve for y.
2. Find the slope(m)
and the y-intercept(b).
3. Draw!
September 26, 2016
Graph the equation.
September 26, 2016
HW p. 78; 9-15 odd, 18,19,20,23-35 odd, 47,51,59
September 26, 2016
Find the slope of the line through the two points.
Find the slope and y -intercept of the line
September 26, 2016
HW p. 78; 9-15 odd, 18,19,20,23-35 odd,
18.)
20.) y= -2