Evaluate at and Evaluate actions are used to compute the value of a function at a point. Note that as many other actions, this actions might be disabled by your instructor, if that's the case you will have to compute the value of the function at a specific point manually.
If you like to compute the values of multiple functions at multiple points, please use "Create new table action":
After typing "Create new table" into action search box, enter the functions and the points into the table by clicking on. Enter functions on the first (Functions) column and the values on the first (Values) row.
Then Gradarius computes the values of the functions as shown in the image above.
Hope you find this helpful. Please never hesitate to contact us here, in case you have questions or concerns related to this action.