When moving left to right across a graph and the line decreases, this is said to have a what kind of slope?
What is negative?
100
This the first thing you plot when graphing the equation y=mx+b.
What is b (y-intercept)?
100
To have the same slope means that the lines are
What is parallel?
100
The equation for direct variation is
What is y=kx?
200
y=kx
What is the equation for direct variation?
200
When a line does not move across a graph left to right, but is vertical on a graph, we call this?
What is undefined?
200
This is graphed after the y-intercept.
What is m (slope)?
200
To have slopes that are reciprocals of each other means that they are?
What is perpendicular?
200
If y=52 and x=4, what does k=?
What is 13?
300
y2-y1
______
x2-x1
What is the equation for slope?
300
When a slope is negative, where do we put the negative sign?
What is the numerator?
300
This is an ordered pair.
What is (x,y)
300
Using the slope of these lines, are these lines parallel or perpendicular?
Line 1: (2,3) (4,7)
Line 2: (5,2) (9,0)
What is perpendicular?
300
If k=4 and x=10, what is y?
What is y=40?
400
y-y1=m(x-x1)
What is the equation for point slope?
400
Putting slope in word form would make it known as?
What is rise ?
_____
run
400
What is x & y intercept?
What is the place where a line crosses the x & y axis?
400
Using the slope of the lines, tell whether the following lines are parallel or perpendicular.
Line 1: (-4,1) (0,29)
Line 2: (3,3) (5,17)
What is parallel?
400
If y=5 and x=2, what is k?
What is k=2.5?
500
y>x+1 or y
What is an inequality?
500
What is the slope that passes through the points (2,5) (8,1)?
What is -2/3?
500
If you were to graph the inequality y>x+1, which side of the line would be true?
What is above the line?
500
When looking for parallel or perpendicular lines, we look to see if the lines have the same slope or reciprocals. What happens if one of them is negative?
What is nothing? (Positive and Negative slopes don't matter in this case.)
500
The purpose of direct variation is to see if a line or equation has?