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# Algebra Week 7

### Math Vocab

negative slope if the line goes down and to the right on a graph
no/zero slope (y = #) is a horizontal line because there is no change in the y value
rate of change tells how fast one variable changes compared with the other
slope (positive or negative) a measure of steepness of a straight line: graphically positive goes up and to the right; graphically negative goes down and to the right.
undefined slope (x=#) is vertical line because there is 0 change in the x value
direct variation when two variables are related in such a way that the ratio of their values always remain the same
starting point the value of the function when time equals zero
rate a ratio that compares two quantities measured in different units
nth term any term in a sequence or pattern
independent variable the input variable whose value in a function affects the output variable (x)
trend a general direction either upward or downward
constant a term that does not contain a variable. (In 3x + 4, the 4 is a constant)
constant rate of change the rate of change in a linear relationship
Created by: Rkinder26