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Chapter 2 review
Term | Definition |
---|---|
absolute value function | a function of the form f(x) = |mx + b| + c where m is not = to 0 is an absolute value function |
dependent variable | if y depends on the value of x then it is a dependent variable. |
direct variation | a linear function defined by an equation of the form y = kx, where k is not =to 0, represents direct variation. |
domain | the set of all inputs, or x-coordinates of the ordered pairs. |
function | a relation in which each element of the domain is paired with exactly one element in the range. |
function notation | f(x) is a function notation. |
independent variable | if y depends on the value of x then it is a dependent variable and x is a independent variable. |
linear equation | y = 3x + 2. |
linear function | a function whose graph is a line. |
linear inequality | |
mapping diagram | a mapping diagram links elements of the domain with corresponding elements of the range. |
parent function | the simplest function with these characteristics. |
point slope form | y - y1 = m(x - x1) |
range | the set of all outputs, or y-coordinates of the ordered pairs. |
reflection | |
relation | a set of pairs of input and output values |
scatter plot | a graph that relates two different sets of data by plotting the data as ordered pairs. |
shrink slope | reduces y-values by a factor between 0 and 1, thereby compressing the graph vertically. |
slope intercept form | y = mx + b |
standard form of a linear equation | Ax + By = C, where A,B and C are real numbers and A and B are not both zero. |
stretch | multiplies all y-values by the same factor greater than 1, thereby stretching a graph vertically. |
transformation | shifts a graph horizontally, vertically, or both. |
translation | a reflection in the x-axis changes y-values to their opposites. |
trend line | a line that approximates the relationship between the data sets of a scatter plot. |
vertex | a point where the function reaches a maximum or minimum. |
vertical line test | a test used to tell whether the relation is a function. |
x intercept | the point at which the line crosses the x-axis. |
y intercept | the point at which the line crosses the y-axis |