Precalculus » A. Functions » A.3. Linear Equations in Two Variables

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Finding and Using Slope

• Overview
• Tell whether the slope is positive, negative, zero, or undefined
• Estimate the slope of the line on a coordinate plane
• Find the slope and y-intercept of the equation
• Find the slope of the line passing through the given points

Writing the Equation of a Line Using the Point-Slope Form

• Overview
• Write the equation of a line given a point and slope
• Write the equation of a line when the slope is undefined
• Write the equation of the line given two points

Finding Parallel and Perpendicular Lines

• Overview
• Determine whether the lines are parallel, perpendicular, or neither given two equations
• Determine whether the lines are parallel, perpendicular, or neither given two sets of two points
• Write the equation of a parallel line given an equation and a point
• Write the equation of a perpendicular line given an equation and a point

Using Slope as a Ratio and Rate of Change

• Overview
• Word problems – Tell whether the slope of the ramp meets the requirements
• Word problems – determine whether sales increased or decreased given a slope and find largest/smallest changes