Section 3.3-3.4 Vocab Flashcards
x-intercept
the ordered pair where the line intersects with the x-axis
what will the y-value always be ____ for the x-intercept
0
y-intercept
the ordered pair where the line intersects with the y-axis
what will the x-value always be ____ for the y-intercept?
0
The equation of a vertical line will always be X=
#
The #=x is the ______ value that the line goes through
x-value
the equation of a vertical line will always be y=
#
the #=y is the ____ value that the line goes through
y-value
vertical lines
the graph of x=c, where c is a real number, is a vertical line with x-intercept (c, 0)
horizontal lines
the graph of y=c, where c is a real number is a horizontal line with y-intercept (0, c)
slope
the slant or steepness of a line, measured by the ratio of vertical change to horizontal change
slope of a line
the slope m of the line containing the points (x1,y1) and (x2, y2) is given by m=rise/run
when a line goes down from left to right, it has a ___________ slope
negative
when a line goes up from left to right, it has a ____________ slope
positive
the slope of a horizontal line will always be
0
