S1 Algebra I Grade Repair

Front

What is a line of best fit?

Back

A line of best fit is a straight line that best represents the data on a scatter plot. It shows the trend of the data points.

Front

How do you determine if a graph represents a function?

Back

A graph represents a function if every input (x-value) has exactly one output (y-value). This can be checked using the vertical line test.

Front

What does it mean for a line to be an accurate estimate of best fit?

Back

An accurate estimate of best fit means that the line closely follows the trend of the data points, minimizing the distance between the line and the points.

Front

Solve for x: 5x - 14 = 8x + 4

Back

x = -6

Front

What is the purpose of a line of best fit in data analysis?

Back

The purpose of a line of best fit is to summarize the relationship between variables and make predictions based on the data.

Front

What is the difference between a function and not a function?

Back

A function has one output for each input, while not a function may have multiple outputs for a single input.

Front

What is the slope of a line?

Back

The slope of a line is a measure of its steepness, calculated as the change in y divided by the change in x (rise/run).

Front

What does it mean if a line has a positive slope?

Back

A line with a positive slope rises from left to right, indicating a direct relationship between the variables.

Front

What does it mean if a line has a negative slope?

Back

A line with a negative slope falls from left to right, indicating an inverse relationship between the variables.

Front

What is the y-intercept of a line?

Back

The y-intercept is the point where the line crosses the y-axis, representing the value of y when x is zero.