Test Review Writing Linear Equations

Front

What is the equation of a vertical line?

Back

x = a, where 'a' is the x-coordinate of any point on the line.

Front

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

Back

y = mx + b, where 'm' is the slope and 'b' is the y-intercept.

Front

How do you find the slope between two points (x1, y1) and (x2, y2)?

Back

Slope (m) = (y2 - y1) / (x2 - x1).

Front

What does it mean for two lines to be parallel?

Back

Two lines are parallel if they have the same slope and never intersect.

Front

What does it mean for two lines to be perpendicular?

Back

Two lines are perpendicular if the product of their slopes is -1.

Front

How do you write the equation of a line given a slope and a point?

Back

Use point-slope form: y - y1 = m(x - x1).

Front

What is the y-intercept of a line?

Back

The y-intercept is the point where the line crosses the y-axis (x=0).

Front

How do you convert from standard form to slope-intercept form?

Back

Rearrange the equation Ax + By = C to solve for y.

Front

What is the slope of a line that is horizontal?

Back

The slope of a horizontal line is 0.

Front

What is the slope of a line that is vertical?

Back

The slope of a vertical line is undefined.