Ceteris paribus, if a company's tax rate is 40%, an increase in depreciation expense of $10,000 would cause net income to go and the firm's cash to go a. down by $6,000; up by $4,000 ob up by $4,000; down by $6,000 od up by $10,000; down by $6,000 d. up by $6,000; down by $10,000