Question

How many times as much does
the yellow T-shirt cost as the blue T-shirt?
Draw a bar diagram and write and solve
an equation.

Yellow shirt $24
Blue shirt $8

Answer 1

The bar diagram is attached below. As we can see, the price of a yellow T-shirt is as three times as the price of a blue T-shirt. Hence, we can construct the following equation to determine the ratio between both prices:

$y = r\cdot x$ (1)

Where:

• $x$ - Price of blue T-shirt, in monetary units.
• $y$ - Price of the yellow T-shirt, in monetary units.
• $r$ - Price ratio, no unit.

If we know that $x = 8$ and $y = 24$, then the price ratio is:

$r = \frac{y}{x}$

$r = 3$

The price of the yellow T-shirt is as three times as the price of the blue T-shirt.

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