Question

what mathematical operation do you often perform to analyze trends in a line graph?
a. multiplication
b. subtraction
c. division
d. addition

Explanation:

To analyze trends in a line graph, we often look at the change in values over intervals. The formula for the slope (which helps in understanding the trend) between two points \((x_1,y_1)\) and \((x_2,y_2)\) on a line is \(m=\frac{y_2 - y_1}{x_2 - x_1}\). The numerator \(y_2 - y_1\) and the denominator \(x_2 - x_1\) involve subtraction.

Answer:

B. Subtraction