Graphing Lines

Front

What is the equation of a horizontal line?

Back

y = c, where c is a constant.

Front

What is the equation of a vertical line?

Back

x = c, where c is a constant.

Front

What is the slope of a line?

Back

The slope (m) is the ratio of the rise (change in y) to the run (change in x).

Tags

CCSS.8.EE.B.5

Front

How do you find the y-intercept of a line?

Back

Set x = 0 in the equation of the line and solve for y.

Front

What does a positive slope indicate about a line?

Back

A positive slope indicates that the line rises from left to right.

Tags

CCSS.8.EE.B.5

Front

What does a negative slope indicate about a line?

Back

A negative slope indicates that the line falls from left to right.

Tags

CCSS.8.EE.B.5

Front

What is the y-intercept of the line y = 2x + 3?

Back

The y-intercept is 3.

Tags

CCSS.8.EE.B.6

CCSS.8.F.A.3

Front

What is the slope of the line represented by the equation y = -4x + 1?

Back

The slope is -4.

Tags

CCSS.8.EE.B.5

Front

What type of line is represented by the equation y = -3?

Back

A horizontal line.

Front

What type of line is represented by the equation x = 5?

Back

A vertical line.