Which Google Sheets function creates line graphs and different types of bar charts right in the cell of a spreadsheet?

The function that creates line graphs and various types of bar charts directly in the cell of a spreadsheet is =sparkline. This function enables users to generate small, simple charts within a single cell, providing a compact visual representation of data trends without the need for separate, larger chart areas. Sparklines can illustrate data patterns and variations effectively, making them a powerful tool for visual analysis within the confines of standard spreadsheet layouts.

In contrast, other functions like =chart and =graph do not exist as functions in Google Sheets, and =mod is unrelated to chart creation, as it’s primarily used for mathematical operations involving remainders. Thus, the uniqueness and functionality of =sparkline make it the correct choice for producing in-cell graphics.