Front

What does the y-intercept represent in the equation y = 12x + 200?

Back

The y-intercept represents the initial fee Phoebe's mom must pay, which is $200.

Front

What is a function?

Back

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

Front

What does a graph showing steady speed forward look like?

Back

A straight line with a positive slope.

Front

What does a graph showing stationary motion look like?

Back

A horizontal line indicating no change in position over time.

Front

In the equation y = 4x + 6, what does the slope represent?

Back

The slope (4) represents the rate of change in cost per movie.

Front

How do you determine if a relation is a function from a graph?

Back

Use the vertical line test: if a vertical line crosses the graph more than once, it is not a function.

Front

What is the cost of Nate’s service for 8 movies?

Back

Nate’s service cost is y = 4(8) + 6 = $38.

Front

What is the cost of Beth’s service for 8 movies if her total cost is $38?

Back

Beth's service cost is $38 for 8 movies.

Front

What does it mean if two runners are moving at the same speed on a graph?

Back

Their lines on the graph have the same slope.

Front

What is the initial cost in the equation y = 12x + 200?

Back

The initial cost is $200.