# About Linear Equation in Excel

I already sketched the slope of lab result to find a value. But I need to do it in Excel which I will include in the lab report. But the slope value is different.

The one I got from sketching in the lab is y = 3333.333x which lead to a 12% error.

But when I use Excel trendline with intercept 0,0, the value is very different as shown in the picture. It's y = 0.696x which seems wrong.

The value that I put is the same as the paper:

• @C.Nititorn, I assume Vt is velocity at time `t` and D is distance at time `t`. If the action is starting from "rest" (zero velocity), the curve should pass through zero. If motion is already underway at time zero (you're graphing a window on action that is already underway), the velocity will be greater than zero at your starting point (which your graph seems to show). Otherwise, the graph might look like that if your values are inaccurate. So the intercept of your data won't be zero. (cont'd) – fixer1234 Jul 7 '18 at 21:52