Sewanhaka High School
Math 8
Name:________________________________ Per:___
Mrs. Lidowsky, Principal
Mr. Long, Teacher
Date:_____________________
H.W. #24 Ditto
DO-NOW #24: Answer the following questions:
1) Write the equation of a line that has a slope of ⅔ and y intercept of
3 and then make a table of values and graph the line.
x
0
3
6
y
(x, y)
2) Find the slope and y-intercept of the line –2x + 3y = 9:
3) What percent of 40 is 8?
Topic: Expressions and Equations
Main Idea: Graphing Lines using Slope and y intercept
Aim:
RECALL
NOTES
You graphed the line y = ⅔x + 3 by using a table.
What would happen if they said to graph the line y = ⅔x + 3 by
using slope-intercept method and not to make a table. How
would you do it?
On the same graph, graph the line y = ⅔x - 3 by using slopeintercept method. How would you do it?
What do you notice about these two lines?
What conclusion can you make about two
___________________________ lines?
Graph the equation of the line, y = 2x – 5 = (2/1x – 5) using
slope intercept form.
On the same graph, graph the equation of the line, y = -½x + 5
using slope intercept form.
What do you notice about these two lines?
What conclusion can you make about the graph of two
________________________ lines?
What if you had to graph the line y = 3? What do you notice?
What if you had to graph the line x = 2? What do you notice?
Drill: Answer the following questions. Show work.
1) Graph the equation of the line, 3x + 4y = 4 using slope
intercept form.
2) On the same graph, graph the equations y = 3x – 2 and y =
3x + 3 using slope intercept form.
What can you say about the two lines and why?
3) On the same graph, graph the equations y =
3
x + 1 and
5
5
x - 6 using slope intercept form.
3
What can you say about the two lines and why?
y=
Summary: