Unit 2 Review

Front

What does it mean if a number is positive?

Back

A positive number is a number greater than zero, indicating a value above a reference point, such as sea level.

Front

What does it mean if a number is negative?

Back

A negative number is a number less than zero, indicating a value below a reference point, such as sea level.

Front

How do you find the distance between two points on a coordinate plane?

Back

Use the distance formula: Distance = |y2 - y1| for points with the same x-coordinate.

Front

What is the distance between the points (0, 6) and (0, -4)?

Back

The distance is 10 units.

Front

What is reflection in geometry?

Back

Reflection is a transformation that flips a figure over a line, creating a mirror image.

Front

What is reflection over the y-axis?

Back

Reflection over the y-axis means that each point (x, y) becomes (-x, y).

Front

What is the absolute value of a number?

Back

The absolute value of a number is its distance from zero on the number line, regardless of direction.

Front

Back

Front

How do you compare two negative numbers?

Back

The number closer to zero is greater. For example, -2 is greater than -4.

Front

Back

It means that -4 is less than -2 on the number line.