Unit 3A and 3B review

Front

What is the equation for a direct variation where y varies directly with x and the constant of variation is 1/4?

Back

y = 1/4x

Front

What is the equation of a line that is parallel to y = 2x + 3 and passes through the point (3, 1)?

Back

y = 2x - 5

Front

How do you write the standard form equation for a line that passes through the points (0, -1) and (-6, -9)?

Back

4x - 3y = 3

Front

What is the 'zero' of the equation 3x + 8y = 24?

Back

(8, 0)

Front

What point does the line with the equation y - 3 = 2(x + 4) contain?

Back

(-4, 3)

Front

Define 'slope' in the context of a linear equation.

Back

The slope is the ratio of the rise (change in y) to the run (change in x) between two points on a line.

Front

What is the standard form of a linear equation?

Back

Ax + By = C, where A, B, and C are integers and A is non-negative.

Front

How do you find the slope of a line given 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 will never intersect.

Front

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

Back

The y-intercept is 3.