The data gives the final examination scores (out of 75) and corresponding exam completion times (seconds) of 134 individuals. Construct a scatterplot of the data that shows the simple linear...

The data gives the final examination scores (out of 75) and corresponding exam completion times (seconds) of 134 individuals. Construct a scatterplot of the data that shows the simple linear regression fit of exam score on time and also gives suitable graphics for the marginal distributions of each variable. Use residual plots to check the assumptions of the model and whether a more complex model might be needed for these data.