P F Test 3 -- Linear Equations

The slope of a line that is perpendicular to a line with a slope of 2 is -1/2.

The equation of a vertical line that passes through (-10, 5) is x = -10.

To find the slope of a line in standard form, rearrange the equation into slope-intercept form (y = mx + b) where m is the slope.

The equation of a line with a slope of 0 is of the form y = b, where b is the y-coordinate of any point on the line.

Use the point-slope form of the equation (y - y1 = m(x - x1)) to find the y-intercept.

The slopes of two perpendicular lines are negative reciprocals of each other.

To convert from standard form (Ax + By = C) to slope-intercept form (y = mx + b), solve for y.

The slope of the line represented by the equation y = -4x + 3 is -4.

The equation of the line is x - 2y = 9.

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