Now the slope shown in the linear regression formula is the slope of the line at the third time, t=0.1s in this case. Now the slope shown in the linear regression formula is the velocity at t=0.1s. To get the next velocity, unselect the first data point, and select the fourth data point. Want more tips? Check out our YouTube video on the subject, where we go into detail about using this function. Remember: When collecting position vs time data, use consistent time intervals between samples, such as 0.1 s. You will notice that your calculated values are greyed-out, denoting that they were calculated, not measured. Once you're done, click the Submit button to run your calculation. Since I'm doing velocity, defined as position per unit time, I want time as "x". Then, click on the variable you want as "y". Since I'm doing velocity, defined as position per unit time, I want position as "y". Next, click on the variable you want as "y". Rate of change is defined as a "y" per unit "x". This will enter the formula RateOfChange("y","x").
In the Formula Calculator, click the Rate of Change button on the bottom of the calculator. For this example, I'll use a velocity column.Ĭlick on the column's options menu, then select Change Column Formula. Create a column to house your rate of change function.