Trend Line Equations Warmup

Front

What is the formula to calculate the slope (m) between two points (x1, y1) and (x2, y2)?

Back

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

Tags

CCSS.8.EE.B.5

Front

What does a negative slope indicate about a trend line?

Back

A negative slope indicates that as one variable increases, the other variable decreases.

Tags

CCSS.8.EE.B.5

Front

What is the slope of the line represented by the equation y = mx + b?

Back

The slope is represented by 'm' in the equation.

Tags

CCSS.8.EE.B.5

Front

How do you determine the y-intercept from the equation of a line?

Back

The y-intercept is the value of 'b' in the equation y = mx + b.

Tags

CCSS.8.EE.B.6

CCSS.8.F.A.3

Front

What is the line of best fit?

Back

The line of best fit is a straight line that best represents the data on a scatter plot.

Tags

CCSS.8.EE.B.5

Front

How do you write an equation for a trend line given a slope and a point?

Back

Use the point-slope form: y - y1 = m(x - x1).

Front

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

Back

The y-intercept indicates the value of y when x is 0.

Tags

CCSS.HSF.LE.B.5

Front

If the slope of a trend line is 2, what does this mean?

Back

For every 1 unit increase in x, y increases by 2 units.

Tags

CCSS.HSF.LE.B.5

Front

What ordered pairs would you use to find the slope for the trend line given points (0,9) and (8,3)?

Back

(0,9) and (8,3) are the ordered pairs used to find the slope.

Tags

CCSS.8.EE.B.5

Front

What is the equation of a trend line with a slope of 2.5 and a y-intercept of 0?

Back

The equation is y = 2.5x.