2.2: Linear Equations Flashcards
linear function
a function whose graph is a line is a _________
linear equation
can represent a linear function with a _______, such as y=3x+2. A solution of a linear equation is any ordered pair (x,y) that makes the equation true.
Dependent varible
the value of y depends on the value of x,y is called the _______
independent varible
is X
y-intercept
of a line is the point at which the line crosses the y-axis.
x-intercept
of a line is the point at which the line crosses the x-axis.
standard form of a linear equation
is Ax +By =C, where A,B,and C are real numbers, and A and B are not both zero.
slope
of a nonvertical line is the ratio of the vertical change to a cooresponding horizontal change.
point slope form
when you know the slope and a point on a line, you can use the _______ to write the equation of the line.
slope-intercept form
another form of the equation of a line is _____ which you can use to find slope by examining the equation.