Chapter 4
... 15. A line passes through (-5, 1) and has a slope of ½. a. Write its equation in point-slope form. b. Transform the equation to slope-intercept form. c. What is the slope of the line? d. What is its y-intercept? 16. A line passes through the points (4, 4) and (-8, -5). a. What is the slope between t ...
... 15. A line passes through (-5, 1) and has a slope of ½. a. Write its equation in point-slope form. b. Transform the equation to slope-intercept form. c. What is the slope of the line? d. What is its y-intercept? 16. A line passes through the points (4, 4) and (-8, -5). a. What is the slope between t ...
What you still need to know - Macmillan Education South Africa
... The problem is that skills tend to get rusty rather quickly if you do not apply them regularly. In this unit, as well as in subsequent units, we will give you the opportunity to not only cement existing map skills but also to learn more advanced map skills. Many of the explanations and examples of s ...
... The problem is that skills tend to get rusty rather quickly if you do not apply them regularly. In this unit, as well as in subsequent units, we will give you the opportunity to not only cement existing map skills but also to learn more advanced map skills. Many of the explanations and examples of s ...
Perpendicular Lines
... 1. Perpendicular lines sometimes lie in the same plane. 2. Two lines are perpendicular if and only if they always form congruent adjacent angles. 3. Perpendicular lines never form 60 angles. 4. If exterior sides of two adjacent angles are perpendicular, then the angles are never supplementary. 5. I ...
... 1. Perpendicular lines sometimes lie in the same plane. 2. Two lines are perpendicular if and only if they always form congruent adjacent angles. 3. Perpendicular lines never form 60 angles. 4. If exterior sides of two adjacent angles are perpendicular, then the angles are never supplementary. 5. I ...
Unit 3 Review
... ____ 19. for two lines intersected by a transversal, a pair of angles that are on the same side of the transversal and on the same sides of the other two lines ____ 20. for two lines intersected by a transversal, a pair of angles that are on opposite sides of the transversal and outside the other tw ...
... ____ 19. for two lines intersected by a transversal, a pair of angles that are on the same side of the transversal and on the same sides of the other two lines ____ 20. for two lines intersected by a transversal, a pair of angles that are on opposite sides of the transversal and outside the other tw ...
Contour line
A contour line (also isoline, isopleth, or isarithm) of a function of two variables is a curve along which the function has a constant value. It is a cross-section of the three-dimensional graph of the function f(x, y) parallel to the x, y plane. In cartography, a contour line (often just called a ""contour"") joins points of equal elevation (height) above a given level, such as mean sea level. A contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness of slopes. The contour interval of a contour map is the difference in elevation between successive contour lines.More generally, a contour line for a function of two variables is a curve connecting points where the function has the same particular value. The gradient of the function is always perpendicular to the contour lines. When the lines are close together the magnitude of the gradient is large: the variation is steep. A level set is a generalization of a contour line for functions of any number of variables.Contour lines are curved, straight or a mixture of both lines on a map describing the intersection of a real or hypothetical surface with one or more horizontal planes. The configuration of these contours allows map readers to infer relative gradient of a parameter and estimate that parameter at specific places. Contour lines may be either traced on a visible three-dimensional model of the surface, as when a photogrammetrist viewing a stereo-model plots elevation contours, or interpolated from estimated surface elevations, as when a computer program threads contours through a network of observation points of area centroids. In the latter case, the method of interpolation affects the reliability of individual isolines and their portrayal of slope, pits and peaks.