math vocabulary

1. The statistical study of the relationship between variables
3. An arrangement of a group of objects in which order is important. The number of permutations of r objects from a group of n objects is denoted nPr.
5. A selection of a group of objects in which order is not important.The number of combinations of r objects chosen from a group of n objects is denoted nCr.
6. of best fit The line that comes closest to all of the points in a data set
8. The side opposite the right angle in a right triangle
9. In a right triangle, the cosecant of angle A is the ratio of the length of the hypotenuse to the length of the side opposite A. It is the reciprocal of the same function
10. in a coordinate plane,the distance from (x1,y1) to (x2, y2) is d=square root of (x2-x1)2 + (y2-y1)2.
13. triangle-One of the two sides of the right triangle that form the right angle
14. A measure of the strength and direction of the relationship between two variables or data sets

2. A system of inequalities in two or more variables in which all of the inequalities are linear
4. A number r, where -1<r<1, that describes how closely the points in a scatter plot cluster around the least-squares line
5. Binomials of the form a+b and a-b. The terms are the same; the signs before b are opposites
7. In a right triangle,the cosine of angle A is the ratio of the length adjacent to angle A to the length of the hypotenuse. It is the reciprocal of the secant function
11. If n is a positive integer,then n factorial,written n is n The factorial of 0 is defined to be 1
12. A triangle with one right angle