# Liner Equations and Funtions

Term Definition
Constant 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 …
Slope the slope or gradient of a line is a number that describes both the direction and the steepness of the line.
Direct Variation When two variable quantities have a constant (unchanged) ratio, their relationship is called a direct variation
X-Intercept The x-intercept of a line is the point at which the line crosses the x axis
Linear Equation A linear equation is an algebraic equation in which each term is either a constant or the product of a constant and (the first power of) a single variable.
Y-Intercept using the common convention that the horizontal axis represents a variable x and the vertical axis represents a variable y, a y-intercept is a point
Point-Slope Form Covers the 'point-slope' form of linear equations, including how to find a line equation using this form.
Unit Rate A rate is a ratio that is used to compare different kinds of quantities
Slope-Intercept Form Covers the 'slope-intercept', or 'y = mx + b', form of straight-line equations
Proportional Relationship between two quantities is one in which the two … relationships are always in the form y = mx , and when graphed produce a line that.
Rate of Change The word slope (gradient, incline, pitch) is used to describe the measurement of the steepness of a straight line. The higher the slope, the steeper the line.
Intersecting Lines Determining where two straight lines intersect in coordinate geometry