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# Pre Algebra Ch 3

### Pre Algebra Chapter 3

constant of variation The number k in an equation of the form y = kx.
direct variation An equation of the form y = kx, where k 0.
linear relationship A relationship that has a straight line graph.
point-slope form An equation of the form y - y1 = m(x - x1)
slope rise over run represented as a change in y values over a change in x values
slope-intercept form An equation written in the form y = mx + b
standard form An equation written in the form Ax + By = C
substitution An algebraic model that can be used to find the exact solution of a system of equations.
system of equations A set of two or more equations with the same variables.
x-intercept The x-coordinate at which a graph intersects the x-axis. Example: (8, 0)
y-intercept The y-coordinate at which a graph intersects the y-axis. Example: (0, 6)
rate of change The change in a quantity over time.
Created by: mrsott