Your teacher surveyed the class to determine the number of hours at eight students spend on social media your teacher created a table in scatterplot graph that display the number of hours and the average final grade based on the hours the trend line for the data is y=-7.2x +98.9 interpret the y-intercept. What is the average grade if I stayed it was on social media for zero hours
The y-intercept of the trend line equation, y = -7.2x + 98.9, represents the value of y (average final grade) when x (number of hours on social media) is equal to zero.
In this case, if someone spends zero hours on social media, the trend line predicts that their average final grade would be 98.9.
Therefore, the average grade if you stayed off social media for zero hours would be 98.9.