Equations of Lines

In slope-intercept form (y = mx + b), which variable represents the y-intercept?

In slope-intercept form (y = mx + b), what does m represent? Give a one-word response.

From the choices above, which are valid ways to find slope?

Fill in the blank: If lines are parallel, then their slopes are __________.

Fill in the blank: If two lines have slopes which are opposite reciprocals of each other, then the lines are __________. (Answer as specifically as possible.)

Line a has a slope of 4. Line b has a slope of 1/4. Are the lines parallel, perpendicular, or neither?

What is the slope of a horizontal line?

What is the equation of the line graphed above?

What is the slope of the line graphed above?

What type of line is x = -1?