Based on your description of the eleven points plotted in a diagonal pattern in the first quadrant of a coordinate plane, it seems like there is a strong positive linear relationship between the x and y values.
If the points are closely following a diagonal line from the lower left to the upper right, the correlation coefficient is likely to be close to +1.
Among the options given, the best estimated correlation coefficient would be:
1
This suggests a perfect positive correlation, reflecting that as x increases, y also increases in a consistent manner. However, since your description mentions a trend, if it wasn't a perfect line but still very close, 0.9 could also be a reasonable estimate.
If you have to choose just based on your description, I would advise going with 0.9 if there's any suggestion of variance, but otherwise, 1 would indicate a strong correlation if the points were perfectly aligned.