Geometry A 2.1-2.2 Flashcard Review

Front

What is the formula to calculate the slope of a line?

Back

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

Tags

CCSS.8.EE.B.5

Front

If a line has a slope of 2, what is the slope of a line perpendicular to it?

Back

The slope of a perpendicular line is the negative reciprocal, so it would be -1/2.

Tags

CCSS.8.EE.B.6

Front

What is the slope of a line that goes down from left to right?

Back

The slope is negative.

Tags

CCSS.8.EE.B.5

Front

What is the slope of a line that goes up from left to right?

Back

The slope is positive.

Tags

CCSS.8.EE.B.5

Front

How do you find the y-intercept of a line given its slope and a point on the line?

Back

Use the formula y = mx + b, where m is the slope and (x, y) is the point. Solve for b.

Tags

CCSS.8.EE.B.6

CCSS.8.F.A.3

Front

What does it mean for two lines to be perpendicular?

Back

Two lines are perpendicular if the product of their slopes is -1.

Tags

CCSS.8.EE.B.6

Front

If a line has a slope of -1/2, what does this indicate about its steepness?

Back

The line is relatively flat, decreasing as it moves from left to right.

Tags

CCSS.8.EE.B.5

Front

What is the significance of the coordinates (x, y) in slope calculations?

Back

They represent points on the line used to determine the slope.

Tags

CCSS.8.EE.B.5

Front

How can you determine if two lines are parallel?

Back

Two lines are parallel if they have the same slope.

Tags

CCSS.8.EE.B.6

Front

What is the relationship between the slopes of two intersecting lines?

Back

The slopes of two intersecting lines are different.

Tags

CCSS.8.EE.B.5