click below
click below
Normal Size Small Size show me how
Chapter 7 Math Vocab
| Question | Answer |
|---|---|
| Graph | the point in the plane |
| x-axis | the horizontal number line |
| y-axis | the vertical number line |
| Ordered Pair | if x=4 and y=7 they can be written as (4,7) |
| Abscissa | the first number in an ordered pair |
| Ordinate | the second number in an ordered pair |
| Coordinates | the abscissa and ordinate |
| Cartesian Coordinate System | the whole system- x-axis, y-axis, points in the plane |
| Quadrants | the axes divide the graph paper into four regions called |
| Scale | a number placed every so many units |
| Solution | an ordered pair that makes the equation a true statement |
| Y Intercept | the value of y when x is 0 |
| X Intercept | the value of x when y is 0 |
| Rise | in going from one point to another in a Cartesian Coordinate System, the rise is the change in y |
| Run | in going from one point to another in a Cartesian Coordinate System, the run is the change in x |
| Slope | the slope of a line is the ratio |
| Slope-Intercept Form | an eqution of the form y= mx+b, where m and b are constants, is in slope-intercept form. |
| Slope of Horizontal Lines | horizontal lines have 0 for a slope |
| Slope of Vertical Lines | vertical lines do not have a slope |
| Point-Slope Form | an equation in the form y - y= m(x - x) is said to be in point-slope form. the slope is m, and a fixed point on the line is (x,y). the variables x and y stand for coordinates of a variable point on the line |
| Equation of Horizontal Lines | if y= constant, the graph is a horizontal line |
| Equation of Vertical Lines | if x= constant, the graph is a vertical line |
| System of Equations | two or more equations with the same variables |
| Solution of a System | an ordered pair that satisfies all the equations in the system |
| Substitution | a method of solving a system of equations by solving one equation to get one of the variables and substituting the result in the other equation |
| Simultaneous Equations | equations in a system that can be solved at the same time |
| Linear Combination | what you get by multiplying each quantity by a constant, then adding the results. the method is also called addition-subtraction |