code: def test_zero_linear_multiplier(self):
      mock_feature = Feature("feature")
      int_bin = sc.IntervalBin(mock_feature, 1.0, 2.0, 3.0)
      self.assertEqual(int_bin.linear_multiplier, 0.0)
  
imports: from unittest import TestCase
  from unittest.mock import MagicMock
  from aix360.algorithms.rule_induction.trxf.core import Feature
  import aix360.algorithms.rule_induction.trxf.scorecard
label_desc: Use image node_id 1 for calling the TestIntervalBin obj's underlying member method code with example usage: obj.test_zero_linear_multiplier() without return types