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Interpreting a Trend Line A trend line with a positive slope indicates a positive relationship between the variables. They increase or decrease together. A trend line with a negative slope indicates a negative relationship between the two variables.

Trend graphs describe changes over time (e.g. a year, a decade). When describing trends in a report you need to pay careful attention to the use of prepositions: Sales in the UK increased rapidly between 2007 and 2010. There was a sharp decline in sales in Japan from 2007 to 2010.

In a line graph we have to express the trend or tendency of each line. If we have to indicate an upward movement, we can say: raise, increase, progress, extend, expand, growth, reach a peak, … If the upward tendency raises in a short period of time, we can describe it as: skyrocket, boom, jump, grow dramatically….

A linear trendline usually shows that something is increasing or decreasing at a steady rate. In the following example, a linear trendline clearly shows that refrigerator sales have consistently risen over a 13-year period. Notice that the R-squared value is 0.9036, which is a good fit of the line to the data.

Interpreting a Trend Line A trend line with a positive slope indicates a positive relationship between the variables. They increase or decrease together. A trend line with a negative slope indicates a negative relationship between the two variables.

Trend graphs describe changes over time (e.g. a year, a decade). When describing trends in a report you need to pay careful attention to the use of prepositions: Sales in the UK increased rapidly between 2007 and 2010. There was a sharp decline in sales in Japan from 2007 to 2010.

In a line graph we have to express the trend or tendency of each line. If we have to indicate an upward movement, we can say: raise, increase, progress, extend, expand, growth, reach a peak, … If the upward tendency raises in a short period of time, we can describe it as: skyrocket, boom, jump, grow dramatically….

A linear trendline usually shows that something is increasing or decreasing at a steady rate. In the following example, a linear trendline clearly shows that refrigerator sales have consistently risen over a 13-year period. Notice that the R-squared value is 0.9036, which is a good fit of the line to the data.