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Mathematics · Ratio and Proportion

Unit Rates

Explore how a unit rate links cost and quantity. Choose a mode to begin.

M Mathematics

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Choose what to explore

Start with a mode

Each mode shows the same unit rate on a double number line in a different way.

See what happens

Learning scene

Change a control and watch the double number line.

Shopping

Explore

Controls

The unit rate stays the same as you change the quantity — every marker on the line shares that rate.

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Simulation menu

Simulation tools

Keyboard help

Use Tab to move between controls, then use the keys below.

TabShift + Tab

Move to the next or previous control.

EnterSpace

Press a focused button, tab or item.

←→↑↓

Change a focused quantity or rate stepper.

123

Open Shopping, Shopping Lab or Racing Lab.

M

Return to the mode selection screen.

R

Reset the simulation.

Esc

Close a menu or dialog, or leave full screen.

Pandai Simulation

Unit Rates

Version 0.5.1

Explore unit rates by shopping for items, experimenting freely in a lab, and comparing two race cars — all on a shared double number line.

A unit rate is a comparison such as cost per item or miles per hour. Every point on the double number line keeps the same rate.

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Choose a simulation mode to begin.