What could be inferred from Susan's SAT score improvement?

The inference that the SAT Prep Math class likely contributed to Susan's score improvement is based on the understanding that structured preparation often leads to enhanced performance on standardized tests. When students enroll in a preparation course, they typically gain access to resources, instructional strategies, and practice opportunities that are specifically designed to address the test's content and format.

The improvement in Susan's score can be taken as evidence that she benefitted from the focused study and guidance provided by the class. This suggests that the skills and knowledge acquired during her preparation may have played a significant role in her improved performance. Thus, the positive outcome aligns with the premise that effective prep courses can enhance understanding and test-taking strategies, leading to better results.