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# Math Vocab Unit 3

TermDefinition
Constant of porportionality factor of proportionality: the constant value of the ratio of two proportional quantities x and y; usually written y = kx, where k is the factor of proportionality.
Direct Variation mathematical relationship between two variables that can be expressed by an equation in which one variable is equal to a constant times the other.
Linear Equation an equation between two variables that gives a straight line when plotted on a graph.
Point-slope form The equation of a straight line in the form y - y 1 = m ( x - x 1 ).
Slope-intercept form A linear equation is an algebraic equation in which each term is either a constant or the product of a constant and a single variable.
Rate of change The speed at which a variable changes over a specific period of time.
Slope a surface of which one end or side is at a higher level than another; a rising or falling surface.
x-intercept the point at which the line crosses the x axis.
y-intercept Where a straight line crosses the Y axis of a graph.
Unit Rate the ratio of two measurements in which the second term is 1.
Proportional relationship relationships between two equal ratios.
Intersecting Lines The point where two lines meet or cross.
Created by: MisCoy17