The coordinate system
How many quadrants are on a coordinate plane?
4
Which letters represent ordered pairs?
(x , y)
When finding the y intercept, where do you plug in 0?
x
What is the formula for finding slope?
y = mx + b
What does the "m" stand for in the equation y= mx + b?
The b?
m = slope
b = y intercept
Which axis is horizontal? Which is vertical?
x= horizontal
y= vertical
Does the equation y = -4x + 3 have a positive or negative slope?
Negative
Find the x intercept of this graph
y = 2x
x = 0
Draw an example of a line with a positive slope
*check student work*
Write the equation of a line whose slope is -5 and y intercept is 2
y = -5x +2
Identify which quadrant this point is located: ( 2, -1)
quadrant 4
Copy and complete each table of values for the equation: y= x +4
Use the values -2, -1, and 0 for x
2, 3, 4
Find the y intercept of this graph
y = -3x - 9
y = -9
Find the slope of a line that passes through ( -2, 5) and ( 2, -3)
m = 2/4
What test do we use to see if a graph is a function?
Vertical line test
Graph ( 0, 0) on your board
What is this point called?
*Check student answers*
origin
Copy and complete a table of values for the equation: y = 2x + 1
Use -1, 0, and 1 as values for x
-1, 1, 3
Find the x and y intercept of the graph
y = x - 1
x= 1
y = -1
Find the slope of a line that passes through ( -1, 5) and ( 5, 5)
m = 0
Evaluate each function:
f(x) = x2+ x
x = 2
f(2) = 6
Label all of the quadrants and give an example of a point located in each one
*check student answers*
Find the x- intercept and y- intercept of this graph
y= -2x - 5
x= -5/2, y = -5
A graph with a slope of 0 is parallel to which axis?
x- axis
Write the equation of a line that passes through the following points:
(0, -3) ( 2, -1)
y = x - 3