If Nicholas wanted to use a performance appraisal style that rated performance on a continuum, he should use the Graphic rating scale form.
It is a performance appraisal style where the various factors contributing to employee performance are rated on a continuum with answers such as excellent, very good, fair, and the like.
The advantage of this is that it can apply to several types of jobs so there would be no need to come up with new appraisal styles.
Find out more on the Graphic rating scale at https://brainly.com/question/25816641.