Zrp200/linear1

require "linear1/slope_intercept"
module Linear1
    class DirectVariation < SlopeIntercept
        def self.try_convert object # @param object [{#to_dv}]
            object.send case object
                when ->(obj) {obj.respond_to? :to_direct_variation} then :to_direct_variation
                when ->(obj) {obj.respond_to? :to_dv} then :to_dv
            else fail TypeError, "Could not convert #{object} to Direct Variation" end
        end
        def initialize k=1
            super display_num(k), 0
        end
        alias k slope
        alias constant_of_variation k
    end
end