ADV 2nd 9 Weeks

Front

What is a scale factor?

Back

A scale factor is a number that scales, or multiplies, some quantity. In geometry, it is the ratio of the lengths of two corresponding sides of two similar figures.

Front

How do you find the scale factor of an enlargement?

Back

To find the scale factor of an enlargement, divide the length of a side of the enlarged figure by the length of the corresponding side of the original figure.

Front

What is point-slope form of a linear equation?

Back

Point-slope form is an equation of a line in the form y - y1 = m(x - x1), where (x1, y1) is a point on the line and m is the slope.

Front

How do you convert a point-slope equation to slope-intercept form?

Back

To convert from point-slope form to slope-intercept form (y = mx + b), solve for y by distributing and isolating y.

Front

What happens to a point when it is rotated 180 degrees about the origin?

Back

When a point (x, y) is rotated 180 degrees about the origin, its image is (-x, -y).

Front

What is slope-intercept form of a linear equation?

Back

Slope-intercept form is an equation of a line in the form y = mx + b, where m is the slope and b is the y-intercept.

Front

How do you find the slope of a line given two points?

Back

The slope (m) of a line given two points (x1, y1) and (x2, y2) is calculated using the formula m = (y2 - y1) / (x2 - x1).

Front

What is the y-intercept of a line?

Back

The y-intercept is the point where the line crosses the y-axis, represented as (0, b) in the slope-intercept form y = mx + b.

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 does it mean for two lines to be perpendicular?

Back

Two lines are perpendicular if the product of their slopes is -1, meaning they intersect at a right angle.