Unit 5 Test Practice (Linear Equations and Inequalities)

Front

True or false: The y-intercept of a function ALWAYS occurs where y is equal to zero.

Back

False. The y-intercept occurs where x is equal to zero.

Front

What is the slope formula?

Back

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

Front

Which of the following equations match the given graph? y ≤ 2x - 4, y ≥ 2x - 4, y < 2x - 4, y > 2x - 4

Back

y ≤ 2x - 4

Front

What is the slope of the line that passes through the points (5, 3) and (5, -9)?

Back

undefined. The line is vertical.

Front

What is the equation of a line with a slope of 4 and a y-intercept of 2?

Back

y = 4x + 2

Front

What does the slope of a line represent?

Back

The slope represents the rate of change of y with respect to x.

Front

What is a linear equation?

Back

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

Front

What does the y-intercept represent in a linear equation?

Back

The y-intercept is the point where the line crosses the y-axis (x=0).

Front

How do you determine if a linear inequality is greater than or less than?

Back

Use a dashed line for 'less than' (<) or 'greater than' (>) and a solid line for 'less than or equal to' (≤) or 'greater than or equal to' (≥).

Front

What is the difference between a function and a relation?

Back

A function is a relation where each input has exactly one output.