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slope

the steepness of a line

slope intercept form

y=mx+b

point slope form

ysub2-ysub1=m(xsub2-xsub1)

standard form

Ax+By=C

slope formula

m= change in y/change in x = (ysub2)-(ysub1) / (xsub2)-(xsub1)

linear equation

equation of a line

x-intercept

the x coordinate of the point where the line crosses the x-axis (the y coordinate is 0)

y-intercept

the y coordinate of the point where the line crosses the y-axis (the x coordinate is 0)

negative reciprocal

opposite reciprocals (ex: 4 and -1/4)

translation

the sliding of the graph of an absolute value equation

parallel lines

lines with the same slope and different y-intercepts

perpendicular lines

lines that intersect to for a right angle (their slopes are opposite reciprocals)