Writing Equations of Line of Best Fits

Front

What is a line of best fit used for?

Back

To make predictions.

Tags

CCSS.8.SP.A.2

Front

How do you find the slope from two points?

Back

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

Tags

CCSS.8.EE.B.5

Front

What does a negative slope indicate about a graph?

Back

It indicates a negative association, meaning as one variable increases, the other decreases.

Tags

CCSS.8.EE.B.5

Front

What is the formula for the slope of a line given in a table?

Back

Slope = (change in y) / (change in x).

Tags

CCSS.8.EE.B.5

Front

If the slope of a line is 5/-2, what does this mean?

Back

For every 5 units the y-value increases, the x-value decreases by 2 units.

Tags

CCSS.8.EE.B.5

Front

What type of association does a graph with a downward trend have?

Back

Negative association.

Front

How can you predict values using a line of best fit?

Back

By using the equation of the line to calculate y for a given x.

Tags

CCSS.HSF.IF.A.2

Front

What is the significance of the y-intercept in a linear equation?

Back

It represents the value of y when x is 0.

Tags

CCSS.8.F.A.3

CCSS.8.EE.B.6

Front

What does it mean if a graph has no association?

Back

There is no discernible pattern or relationship between the variables.

Front

How do you interpret the slope in a real-world context?

Back

It shows the rate of change between the two variables.

Tags

CCSS.8.EE.B.5