Chapter Eight Linear Functions and Graphing
the set of first coordinates of the ordered pairs of a relation.
a relation where each number in the domain is paired with exactly one number in the range.
an equation that describes a function.
an equation whose graph is a line.
looks like a linear equation, but with an inequality symbol.
one set of data values increase as the other set decreases.
there is no relationship between data sets.
both sets of data values increase.
the set of second coordinates of the ordered pairs of a relation.
a set of ordered pairs.
a graph with points plotted to show a possible relationship between two sets of data.
a ratio that describes the tilt of a line.
y=mx+b, where m is the slope and b is the y-intercept of the line.
is any value or values that make an equation or an inequality true.
line of best fit
a line drawn in a scatter plot to fit most of the dots and shows the relationship between the two sets of data
is something that allows you to describe graphically whether a relation is a function.
the y-coordinate of the point where the line crosses the y-axis.
y-y1 = m(x-x1), where m is the slope and (x1,y1) is the point the line is passing through.
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.
the x-coordinate of the point where a line crosses the x-axis.