Your teacher surveyed the class to determine the number of hours that each student spent on social media. Your teacher created a table and scatterplot graph that displayed the number of hours and the average final grade based on the hours. The trend line (equation) for the data is y=−7.2x+98.9 . Interpret the y -intercept. What is the average grade if a student was on social media for 0 hours?(1 point)
The y-intercept of the trend line equation, y=−7.2x+98.9, represents the average grade if a student spent 0 hours on social media. In other words, it is the average final grade for a student who did not use social media at all.
Based on the equation, when x (the number of hours spent on social media) is 0, the value of y (the average final grade) will be 98.9.
Therefore, if a student was on social media for 0 hours, their average grade would be 98.9.
Your company asked you to analyze the investment of their advertising campaign. You create a scatterplot graph of the advertising dollars spent on advertising, x , and compare it to the revenue generated, y , for January to December of the campaign. You find the equation of the trend line to be y=2.53x+43 . Predict the revenue generated if your company invests $200.00 in advertising. Write the revenue in dollars and cents.(1 point)
The revenue generated for a $200.00 investment in advertising is $
.