Unit 3C review

Front

What does the inequality y ≥ -3 represent on a graph?

Back

The area above the horizontal line y = -3, including the line itself.

Front

What is the equation for direct variation when y is 16 and x is 32?

Back

y = (1/2)x

Front

Back

The slope is -3/4.

Front

Which point is NOT part of the solution set for the inequality y < 2x + 1?

Back

(-1, -3)

Front

Which point is NOT part of the solution set for the inequality y ≥ -x?

Back

(5, 10)

Front

What is the definition of a linear equation?

Back

An equation that makes a straight line when graphed, typically in the form y = mx + b.

Front

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

Back

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

Front

What does it mean for two lines to be perpendicular?

Back

Their slopes multiply to -1.

Front

What is the standard form of a linear equation?

Back

Ax + By = C, where A, B, and C are integers.

Front

Back

The y-intercept is 3.