M8: Unit4 Practice Test

Front

What is the slope of a line that passes through the points (12,7) and (0,9)?

Back

The slope is -\frac{1}{6}.

Front

How long did it take for the pizza to reach 10 degrees Celsius if its temperature is graphed as a function of time?

Back

It took 2 minutes.

Front

In the equation y = -200x + 9000, how much does Harry pay back each month?

Back

Harry pays back $200 each month.

Front

What is the y-intercept of the graph represented by the equation y = mx + b?

Back

The y-intercept is the point (0,b). For example, in y = -\frac{4}{5}x - 13, the y-intercept is (0,-13).

Front

What is the slope in the equation y = -\frac{4}{5}x - 13?

Back

The slope is -\frac{4}{5}.

Front

Define slope in the context of a linear equation.

Back

Slope is a measure of the steepness of a line, calculated as the change in y over the change in x (rise/run).

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, indicating the value of y when x = 0.

Front

How do you calculate the slope between two points (x1, y1) and (x2, y2)?

Back

Slope = \frac{y2 - y1}{x2 - x1}.

Front

What is the significance of a negative slope?

Back

A negative slope indicates that as x increases, y decreases, showing an inverse relationship.

Front

What does it mean if the slope of a line is zero?

Back

A slope of zero means the line is horizontal, indicating that y remains constant as x changes.