---
title: "Function Duotone Icon | Free Download PNG & SVG | Phosphor Duotone"
product: "Streamline Icons, Illustrations and Elements"
url: /icons/download/function-duotone--28969
canonical_url: "https://www.streamlinehq.com/icons/download/function-duotone--28969"
summary: "Clean duotone icon of a curved function line crossing a horizontal bar. Used for math, formulas, and graphing tools."
---

# Function Duotone icon

The Function Duotone icon shows a bold curved function line crossing a horizontal bar over a rounded square backdrop. Drawn in the duotone style on a 16px grid, with layered tones that keep the symbol clear in compact interfaces. Use it for mathematical functions, formulas, graphing tools, calculus controls, and educational software. It belongs to Phosphor Duotone free set in the Phosphor family.

## Preview

![Clean duotone icon of a curved function line crossing a horizontal bar. Used for math, formulas, and graphing tools.](https://assets.streamlinehq.com/image/private/w_300,h_300,ar_1/f_auto/v1/icons/phosphor-duotone/phosphor-duotone/duotone/function-duotone-03xuuc0kthaw69sr5h04vzg.png?_a=DATAiZkSZAA0)

## Details

- **Name**: Function Duotone
- **Type**: Icon
- **Set**: [Phosphor Duotone](/icons/phosphor-duotone.md) — Phosphor is a free and open source icon set created by Helena Zhang and Tobias Fried.
- **Family**: [Phosphor](/icons/phosphor.md)
- **Style**: Duo, Filled, Outlined, Minimal
- **Category**: All Icons › Vector Icons
- **Default size**: 16px
- **Pricing**: Free
- **License**: [MIT](https://raw.githubusercontent.com/phosphor-icons/homepage/master/LICENSE)
- **Author**: [Phosphor](https://phosphoricons.com/)
- **Formats**: PNG, WEBP, PDF, SVG, JSX
- **Tags**: function, symbol, music, notation, staff, score, sharp, flat, clef, key

## Download

- [Download Function Duotone on Streamline](https://www.streamlinehq.com/icons/download/function-duotone--28969)

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