Exemplo de Gráfico em Área
google.charts.load('current' , {'packages': ['corechart']});
google.charts.setOnLoadCallback( drawChart );
function drawChart(){
var data = new google.visualization.DataTable();
data.addColumn('string', 'Ano');
data.addColumn('number', 'Despesas');
data.addColumn('number', 'Receitas');
data.addRows(
[
['2016' , 1000 , 470 ],
['2017' , 1170 , 560 ],
['2018' , 690 , 1120 ],
['2019' , 780 , 630 ],
]
);
var options = {'title':'Fluxo',
'width':500,
'height':350
};
var chart = new google.visualization.AreaChart(document.getElementById('chart_div'));
chart.draw(data, options);
}