14 terms

# algebra midterm review

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expression
consist of numbers, variables, and operations (does not have an equal sign)
equation
a mathematical sentence formed by placing the symbol = between two expressions
function
a pairing of inputs with outputs such that each input is paired with exactly one output.
reciprocal
pair of numbers whose product is 1: the reciprocal of 2/3 is 3/2
like terms
terms that have the same variable parts. Constant terms are also like terms.
linear equation
an equation whose graph is a line
slope
slope of a nonvertical line is the ratio of the vertical change (rise) to the horizontal change (run) between any two points on the line
parallel lines
lines in the same plane that do not intersect; same slope
perpendicular lines
lines in the same plane that intersect to form a right angle; slopes are negative reciprocals
inequality
a mathematical sentence formed by placing an inequality symbol between two expressions
slope intercept form
y = mx + b
point-slope form
y-y1 = m(x-x1), where m is the slope and (x1,y1) is the point the line is passing through.
standard form
Ax + By = C
slope formula