Term

Definition
A plane which is formed by two real number lines that intersect at a right angle. 


Term

Definition
A pair of numbers used to identify a point in a plane 


Term

Definition
One of 4 parts into which the axes divide a coordinate plane. 


Term
If an ordered pair is in the first quadrant, what are the signs of x and y? 

Definition


Term
If an ordered pair is in the second quadrant, what are the signs of x and y? 

Definition
x is negative and y is positive 


Term

Definition
A graph of pairs of numbers that represent reallife situations as a method to analyze the relationship between two quantities. 


Term
What are three relationships you can determine from a scatter plot? 

Definition
positive, negative, no linear relationship 


Term
If there is a positive relationship in a scatter plot and the x values are increasing, what can you determine about the y values? 

Definition


Term
What is all of the solution of the following equation:
y = 3x + 6 

Definition
a line of slope 3 and yintercept 6 


Term
Why is the solution of any equation in the form y = mx + b a line? 

Definition
There are infinite number of solutions. However, for every x value there is one y value that is a solution. This relationship creates a line. 


Term
Name 4 methods of graphing a line. 

Definition
1. Calculator
2. Pick 3 x values and find matching y values
3. Graph b and use m to find more points
4. Find the xintercept and yintercept 


Term
If you are using m and b to graph a line, how do you use m to find more points. 

Definition
Go to b on the graph go right by the denominator and up or down by the numinerator. 


Term
How do you find the xintercept? 

Definition
Make y = 0, and find solve for x. 


Term
How do you find the yintercept? 

Definition
1. put equation in y= form and b is yintercept
2. make x = 0 and solve for y 


Term

Definition
The number of units a nonvertical line rises or falls for each unit of horizontal change from left to right. 


Term
Why is slope often defined as rise/run? 

Definition
Because to find the slope you find the change in the vertical value (rise) divided by the change in the horizontal value (run) 


Term
What is the formula for the slope? 

Definition


Term
What is the slope of a line that is vertical? 

Definition


Term
Describe a line with a positive slope. 

Definition


Term
Describe a line with a negative slope. 

Definition
line falls from left to right 


Term
Describe the line with the equation y = 4 

Definition
it is a horizontal line with zero slope through the point 4 


Term
Describe the line with the equation x = 2 

Definition
It is a vertical line with an undefined slope through the point 2 


Term
How can you solve a one variable equation with a graph? 

Definition
graph it as if y = the equation and find the xintercept 


Term
What do you need to write an equation of a line in y=mx+b form? 

Definition


Term
If you know the slope and one point on the line, how can you find b? 

Definition
Replace m in the equation y = mx + b and use the point in x and y temporily to find b. 


Term
How can you determine if two lines are parallel? 

Definition


Term
How can you determine if two lines are perpendicular? 

Definition
If you multiple their slope it equals 1.
or the slope are opposite recipricals of each other 


Term
Name an equation of a line that is perpendicular to x = 3 

Definition

