Algebra 2: 1.4-1.7

Question 1

For (x1,y1) and (x2,y2); m=y2-y1/x2-x1

Answer 1

Slope Formula

Question 2

y=mx+b; m=slope b=y-intercept

Answer 2

Slope-Intercept Form

Question 3

Given slope m and a point (x1-y1): y-y1=m(x-x1)

Answer 3

Point-Slope Form

Question 4

The __________ is the line that lies as close as possible to a set of data points.

Answer 4

line of best fit

Question 5

The ______________, denoted by r, is a number from -1 to 1 that measures how well a line fits a set of data points. When r is near 1, the points lie close to the line with a positive slope. When r is near -1, the points lie close to a line with a negative slope. When r is near zero, the points do not lie close to any line.

Answer 5

correlation coefficient

Question 6

A ___ , x, y, and z, is an equation of the form ax +by + cz = d, where a, b, and c are not all 0.

Answer 6

Linear equation in three variables

Question 7

A solution of a system of three linear equations in 3 variables I am ___ (x,y,z) whose coordinates make each equation true.

Answer 7

Ordered triple

Question 8

A ____ is a rectangular arrangement of numbers

Answer 8

Matrix

Question 9

The ____ of a matrix with m rows and n columns are m x n.

Answer 9

dimensions

Question 10

The numbers in a matrix are its _____.

Answer 10

elements

Question 11

A matrix derived from a system of linear equations using coefficient and the constants is the ________________ of the system

Answer 11

augmented matrix

Question 12

The sum or difference of 2 matrices with different dimensions in ____.

Answer 12

undefined

Question 13

________ is plural for the word matrix.

Answer 13

matrices