Angle between two lines measures inclination between them. There are two types: acute and obtuse angles. Angle between lines is always positive
Vertical line is perpendicular to base and goes from top to bottom. All points on vertical line have same x-coordinate. Equation of vertical line is always x = a. X-intercept of vertical line is (a,0)
Slope describes line's steepness from horizontal, positive slope means rising. Slope formula uses slope (m) to calculate line's rise over run. Slope is expressed as ratio of y-values to x-values
X and Y coordinates identify points in two-dimensional space. Coordinates are written as ordered pair (x, y). Abscissa represents horizontal distance from y-axis. Ordinate represents vertical distance from x-axis
Horizontal lines are straight lines parallel to the horizon. They have zero slope and remain constant height from ground. Also known as sleeping lines, found in staircase steps and railway tracks
Solutions are provided for instructors using Adams and Essex's Calculus textbooks. Manual contains detailed solutions for core material and techniques. Some details may be omitted in applications of integration