reversed options as well

app/models/question.rb

@@ -32,8 +32,13 @@ class Question < ApplicationRecord
     [option1, option2, option3, option4, option5]
   end
 
+  def options_with_reverse
+    return options.reverse if reverse?
+    options
+  end
+
   def option_index(answer)
-    options.map(&:downcase).map(&:strip).index(answer.downcase.strip)
+    options_with_reverse.map(&:downcase).map(&:strip).index(answer.downcase.strip)
   end
 
   def aggregated_responses_for_school(school)

app/views/shared/_histogram.html.haml

@@ -1,7 +1,7 @@
 - histogram = data.responses.map(&:answer_index_with_reverse).group_by { |a| a.to_s }
 %table.answers
   %tbody
-    - data.question.options.each_with_index do |option, index|
+    - data.question.options_with_reverse.each_with_index do |option, index|
       %tr.answer
         - group = histogram[(index + 1).to_s]
         - width = (100 * (group.blank? ? 0 : group.length)) / histogram.values.flatten.length