What is the equation for the parabola with focus (2, 4) and directrix x = 1?
A) 2x − 3 = (y + 4)2
B) 2x − 4 = (y + 3)2
C) 2x − 3 = (y − 4)2
D) 2x − 4 = (y − 3)2

Ameteorologist is studying the monthly rainfall in a section of the brazilian rainforest. she recorded the monthly rainfall, in inches, for last year. they were: 10.4, 10.3, 11.7, 11.1, 8.0, 4.4, 2.6, 1.8, 2.5, 4.4, 7.3, 9.5 fill in the missing values in the formula. what is the variance?