CEDAR RAPIDS — The Linn County Board of Supervisors have rejected a recommended 3 percent wage increase for supervisors this coming fiscal year — citing the board’s upcoming reduction from five members to three as a key reason.The board on Wednesday voted 4-0, with Supervisor Brent Oleson absent, to approve a 3 percent increase for the county’s other elected officials — the county attorney, auditor, recorder, sheriff and treasurer.Linn County’s compensation board — an appointed committee that recommends annual pay adjustments for elected officials — recommended a 3 percent increase for all elected officials, including supervisors.