In the graph of a line, the ratio for the slope indicates the rate of change.
Find the rate of change for each table, equation, or graph. How did you find the rate of change?
x | 2 | 4 | 6 |
---|---|---|---|
y | 10 | 20 | 30 |
There are several forms for the equation of a line. Each form communicates different information. For instance, from the point-slope form, you can determine a point and the slope of a line.
Write an equation in slope-intercept, point-slope, or standard form for the line with the given information. Explain why you chose the form you used.
You can model the trend of the real-world data in a scatter plot with an equation of a line. You can use the equation to estimate or to make predictions.
At the beginning of a 20-month period, Stacie owns one clothing store. During that period, she opens a second clothing store in a different location. The table shows the total monthly sales of Stacie's clothing stores for the 20-month period.
Month | 2 | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 |
---|---|---|---|---|---|---|---|---|---|---|
Sales | 3 | 5 | 4 | 6 | 5 | 12 | 16 | 22 | 26 | 32 |