Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.


Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Don't know
Know
remaining cards
Save
0:01
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
Retries:
restart all cards
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Algebra Vocab: U. 4

Vocabulary List for Math Class Unit Four

TermDefinition
proportional relationships two variables with respective values are always in the same ratio (they have the same relative size to one another). One variable is always a constant multiple of other. In equation form if the two variables are x and y: y/x = k or kx = y
constant of proportionality if one variable is always the product of the other and a constant, the two are directly proportional. x and y are directly proportional if the ratio yx is constant. In y/x = k and kx = y k is the constant of proportionality
conversions feet in a mile, inches in a foot, feet in a yard, minutes in an hour, months in a year, cm in a meter, meters in a km, minutes in an hour, quarts in a gallon, pints in a quart, cups in a pint
the slope-intercept form of a linear function given a linear equation, f(x), it can be expressed in equation form by: f(x) = y = mx + b. m = average rate of change = slope = delta y/ delta x and b = y-intercept of the line
non-proportional linear relationsips form a line when graphed; if two points in a line are not equal, it is not proportional; variables are not constant multiples of the other
negative slope moves upward on a graph from left to right
positive slope moves downward on a graph from left to right
critical linear model facts: slope and y-intercept all linear models in the form y = mx +b have two parameters, the slope, m, and the y-intercept, b: 1. The slope, m, tells us how fast the output is changing relative to the input 2. The y-intercept, b, always tells us the output's starting value ( x = 0)
horizontal line y = constant (constants can be determined by using any point the line passes through)
vertical line x = constant (constants can be determined by using any point the line passes through)
absolute value function a function that contains an algebraic expression within absolute value symbols which gives us the "size" or magnitude of a number. The absolute value of a number is its distance from 0 on the number line
step function a function that has outputs to a particular function that are constant over particular ranges
graphing equations and inequalities the connection between graph and equations/inequalities: 1. Any coordinate pair(x, y) that makes an equation or inequality true lies on the graph 2. The entire graph is a collection of all the (x, y) pairs that make the equation or inequality true
sequence a function whose set of inputs, the domain, is a subset of the natural numbers, i.e. {1, 2, 3, 4...} . It is often shown as an ordered list of numbers, called the terms or elements of the sequence
arithmetic sequences sequences where the terms in the list increase or decrease by the same amount given a unit increase in the index (where the number is in line)
Created by: Amo.Alexa.1920