Unit 3 Flashcard Scatter Plots and Slope

Front

What is the standard form of a line?

Back

Ax + By = C

Front

How do you predict values using a trend line in a scatter plot?

Back

Use the trend line to estimate the value corresponding to a given input (e.g., number of chapters).

Front

What does the line of best fit represent in a scatter plot?

Back

It represents the trend of the data points, minimizing the distance from all points.

Front

What is a perfect positive correlation coefficient?

Back

1

Front

What is the y-intercept in the equation y = -4x - 5?

Back

-5

Front

What is the slope-intercept form of a line?

Back

y = mx + b, where m is the slope and b is the y-intercept.

Front

What does a slope of 0 indicate about a line?

Back

The line is horizontal, indicating no change in y as x changes.

Front

What does a negative slope indicate about the relationship between x and y?

Back

As x increases, y decreases.

Front

How can you determine the slope from two points (x1, y1) and (x2, y2)?

Back

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

Front

What is the purpose of a scatter plot?

Back

To visually represent the relationship between two quantitative variables.