Unit 7 Flashcard 1

Front

What is the value of x if it is given that x = 121°?

Back

x = 121° is the solution to the problem.

Front

How do you calculate the slope of a line given two points (0, -2) and (3, -4)?

Back

Slope (m) = (y2 - y1) / (x2 - x1) = (-4 - (-2)) / (3 - 0) = -2/3.

Front

What is the slope of the line if it is given as 4/1?

Back

The slope of the line is 4.

Front

What is the point-slope form of a line that passes through (-2, -1) with a slope of -3?

Back

The point-slope form is y + 1 = -3(x + 2).

Front

What does it mean if two lines are parallel?

Back

Two lines are parallel if they have the same slope and will never intersect.

Front

What is the formula for finding the slope between two points?

Back

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

Front

If two lines have the same slope, what can we conclude about them?

Back

They are parallel lines.

Front

What is the difference between parallel and perpendicular lines?

Back

Parallel lines have the same slope; perpendicular lines have slopes that are negative reciprocals of each other.

Front

What is the slope of a line that is vertical?

Back

The slope of a vertical line is undefined.

Front

What is the slope of a line that is horizontal?

Back

The slope of a horizontal line is 0.