Perpendicular
Are these equations perpendicular?
y=3x+2
y=-3x-1
What is no?
(Their slopes do not multiply to -1)
Does a positive slope ascend from left to right?
If so, give an example.
What is yes?
(example: y=x-1)
The origin is at (0,-1).
What is false?
Given: y+2=4(x-1)
Solve for slope intercept form.
What is y=4x-6?
Perpendicular lines intersect at _____ angles.
What is right?
Are y=-1 and x=6 perpendicular lines?
What is yes?
(horizontal and vertical lines form a right angle)
x=4
Describe its slope.
Vertical line on positive x-axis.
Slopes of vertical lines are undefined.
Given: y=mx+b
b represents the slope.
What is false?
(b represents the y-intercept)
Given: Point (3,-4) and slope m=-1
Which formula would you use?
What is point slope formula?
A _______ is used to model real life situations.
What is a linear model?
How many degrees are in a right angle?
What is 90?
y=-3
Describe its slope.
Horizontal line on negative y-axis.
Slopes of horizontal lines are 0.
Horizontal and vertical lines form acute angles when they intersect each other.
What is false?
(Acute angles are less than 90 degrees)
Which formula would you use if you do not know the y-intercept?
What is point slope formula?
In y=mx+b, m is the ______ and b is the _____.
Are horizontal and vertical lines perpendicular?
What is yes?
y=2x+1
Positive slope going up from right to left.
y-intercept at +1.
Use rise over run (slope) to find second point.
In a linear model, the slope represents a rate of change.
What is true?
Given: Point (2,1) and slope m=2
Solve for slope intercept formula.
What is y=2x-3?
Use the _________ if you know the y-intercept.
What is the Slope Intercept Formula?
Rule for perpendicular lines.
The product of their slopes must be -1.
Given: y-2=2(x+1)
Solve for slope intercept form, then graph.
What is y=2x+4?
y-intercept on positve y-axis.
Use rise over run (slope) to find second point.
Given: 2x=5y-10
This equation is in standard form.
What is false?
(2x-5y=-10 would be in standard form)
Given: Points (2,1) and (1,-1)
Find the slope. Solve for Slope intercept form.
What is m=2?
y-1=2(x-2)
y-1=2x-4
What is y=2x-3?
When you are given two points, but are not given a y-intercept, first use the _________ .
What is the Slope Formula?