| A | B |
|---|
| direct variation | a linear function defined by an equation of the form y = kx |
| rise | the vertical change between two points on a line |
| run | the horizontal change between two points on a line |
| diameter | a segment that joins two points of the circumference of a circle with the center of the circle |
| arc | part of the circumference of a circle |
| dimensional analysis | a problem solving strategy where you cancel units of measurement as if they are numbers |
| variation constant | the nonzero constant k in a direct variation defined by y = kx |
| circumference | the perimeter of a circle |
| arc length | the measurement of an arc |
| conversion factor | a ratio of two equal (or approximately equal) quantities that are measured in different units |
| slope | the measure of the steepness of a line given by the ratio of rise to run for any two points on the line |
| tangent ratio | the ratio fo the length of the leg opposite an acute angle in a right triangle to the leg adjacent to said angle |
| pi | the ratio of the circumference of a circle to its diameter |
| y = kx | the general form for direct variation |
| sector | the region formed by a central angle and its arc |
