2.2:linear equations

Question 1

linear function

Answer 1

A function whose graph is a line

Question 2

Linear equation

Answer 2

A solution to the linear equation is any ordered pair that makes the equation true.

Question 3

Dependent variable

Answer 3

Y depends on the value of x

Question 4

Independent variable

Answer 4

x value can be changed

Question 5

y- intercept

Answer 5

the point at which the line crosses the y axis

Question 6

x- intercept

Answer 6

a line is the point at which the line crosses x axis

Question 7

standard form of a linear equation

Answer 7

is Ax + By = C where A,B and c are real numbers and A an B arn’t 0

Question 8

Slope

Answer 8

a nonverticle line is the ratio of the vertical change to a corresponding horizontal change.

Question 9

point- slope form

Answer 9

the equation of a straight line in the form y − y1 = m(x − x1) where m is the slope of the line and (x1, y1) are the coordinates of a given point on the line — compare slope-intercept form.

Question 10

slope- intercept form

Answer 10

the way of writing the equation of a line so that the slope (steepness) and y-intercept (where the line crosses the vertical y-axis) are immediately apparent.