5-1

What is the formula for slope?

5-1

What is the slope of a vertical line?

5-1

What is the slope of a horizontal line?

5-4

What is the x-intercept?

Where the line crosses the 

x-axis. Where y = 0.

5-4

What is the y-intercept?

Where the line crosses the

y-axis. Where x = 0.

5-3

What is the slope-intercept form of the equation of a line?

5-1

What is slope?

vertical change

horizontal change

rise

run

5-4

What is the point-slope form of the equation of a line?

(y - y₁)= m(x - x₁)

where m= slope  and

(x₁,y₁) is any point on the line.

5-3

What is the equation of line in standard form?

5-6

How do the slopes of 2 parallel line relate?

5-6

How do the slopes of perpendicular lines relate?

The slopes are opposite reciprocals of each other.

For example, if one has a slope of 2, the other has a slope of -½.

5-3

   Given the equation

y = mx + b, which value is the slope and which value is the y-intercept?

m = slope

b = y-intercept

5-4

What is the equation of a vertical line?

x = where it crosses the

x-axis.

5-4

What is the equation of a horizontal line?

y = where it crosses the

y-axis.