Think about a density curve that consists of two line segments. the first goes from the point (0, 1) to the point (0.7, 1). the second goes from (0.7, 1) to (0.9, 2) in the xy-plane. what percent of observations fall between 0.7 and 0.9?
a) 0.20
b) 1.00
c) 0.05
d) 0.30
e) 0.50
f) none of the above