need help please

The article The Role of Niche Breadth, Resource Availability and Range Position on the Life History of Butterflies (A. Komonen, A. Grapputo, et al., Oikos, 2004:4154) describes a study of several species of Butterflies found in Finland. The following table presents the mean wingspan (in mm) and the flight period, defined as the mean number of days of appearance in the winged state, for 23 species in the family Lycaenidae. Let X = Wingspan and Y = Flight Period. Flight Flight Flight Flight Wingspan Period Wingspan Period Wingspan Wingspan Period Period 35.5 19.8 25.9 32.5 28.8 25.9 28.1 18.5 30.6 17.3 31.3 27.5 35.9 23.1 25.9 32.3 30.0 27.5 23.0 31.0 23.0 53.1 28.8 29.1 32.3 22.4 26.3 37.4 24.6 38.8 31.4 37.0 23.9 40.7 23.7 22.6 28.1 36.5 28.5 33.7 27.7 18.3 27.1 23.1 25.4 24.0 Some useful summary statistics are: x = 28.07826, Sx = 3.618131 y = 29.22174, Sy = 8.770247 r = -0.4973761, SSE = 1273.563 Calculate a 90% confidence interval for the population slope, no interpretation is needed at this time. O (55.286, 70.861) O (-2.927, 0.515) O (-2.166, -0.251) O (-1.664, -0.747) O (-1.995, -0.416)