Equation of a straight line

Front

What is the equation of a straight line in slope-intercept form?

Back

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

Front

How do you calculate the slope of a line given two points (x1, y1) and (x2, y2)?

Back

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

Front

What does a positive slope indicate about a line?

Back

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

Front

What does a negative slope indicate about a line?

Back

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

Front

What is the slope of a horizontal line?

Back

The slope of a horizontal line is 0.

Front

What is the slope of a vertical line?

Back

The slope of a vertical line is undefined.

Front

What does the y-intercept represent in the equation of a line?

Back

The y-intercept is the point where the line crosses the y-axis.

Front

What does the x-intercept represent in the equation of a line?

Back

The x-intercept is the point where the line crosses the x-axis.

Front

If a line has a slope of 5/2, what does this mean in terms of rise over run?

Back

For every 2 units you move to the right (run), the line rises 5 units (rise).

Front

What is the relationship between parallel lines and their slopes?

Back

Parallel lines have the same slope.