<?php
use Microsoft\Graph\GraphServiceClient;
use Microsoft\Graph\Generated\Models\WorkbookChartPoint;
$graphServiceClient = new GraphServiceClient($tokenRequestContext, $scopes);
$requestBody = new WorkbookChartPoint();
$result = $graphServiceClient->drives()->byDriveId('drive-id')->items()->byDriveItemId('driveItem-id')->workbook()->worksheets()->byWorkbookWorksheetId('workbookWorksheet-id')->charts()->byWorkbookChartId('workbookChart-id')->series()->byWorkbookChartSeriesId('workbookChartSeries-id')->points()->post($requestBody)->wait();