Algebra Unit 4

2. A line with a slope of 0; its equation is y=b.
4. A statistical method used to find the equation of the line that best fits a set of data points.
6. The measure of a line's steepness, calculated as rise over run.
11. A relationship in which there is no apparent pattern between the variables.
12. A slope less than 0; the line falls from left to right.
14. A slope greater than 0; the line rises from left to right.
15. A slope that does not exist because the run is 0; the graph is a vertical line.
17. The point where a graph crosses the y-axis; the x-coordinate is 0.
18. A relationship in which both variables increase together.
20. A line drawn through a scatter plot that best represents the trend of the data.
21. The point where a graph crosses the x-axis; the y-coordinate is 0.
22. A form of a linear equation written as: Ax+By=C where A, B, and C are integers and A≥0.

1. A relationship in which one variable increases as the other decreases.
3. Two numbers whose product is −1. To find the opposite reciprocal, switch the numerator and denominator and change the sign. Example: The opposite reciprocal of3/2 is -2/3.
5. A graph that displays pairs of data as points to show relationships between two variables.
7. A line with an undefined slope; its equation is x=a.
8. A form of a linear equation written as: y=mx+b where m is the slope and b is the y-intercept.
9. Lines that intersect at right angles; their slopes are opposite reciprocals.
10. A slope of 0; the graph is a horizontal line.
13. A formula used to find the slope of a line through two points.
16. Lines in the same plane that never intersect and have the same slope.
19. A form of a linear equation written as: y-y1=m(x-x1) where m is the slope and (x1,y1) is a point on the line.