Final answer:
The point (4.5,90.4) represents a student who studied for 4.5 hours and received a quiz grade of 90.4, based on a scatterplot showing the relationship between hours studied and quiz grades with a line of best fit.
Step-by-step explanation:
The point (4.5,90.4) on the coordinate axis plotted by Shaquana's math teacher represents a student's performance where the x-coordinate, 4.5, likely indicates that the student studied for 4.5 hours, and the y-coordinate, 90.4, indicates that the student received a grade of 90.4 on their weekly quiz. This is presumed based on the context where the graph is showing a correlation between study hours and quiz grades, and a line of best fit is drawn to represent this relationship.
Understanding this point helps to visualize how increases in study time might correlate with higher grades, which could be indicated by the slope of the line of best fit plotted by the teacher. However, without the full context of the study hours on the x-axis and the quiz grades on the y-axis, this interpretation is based on typical conventions used in such scatterplots.