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Lily has $45 in her school lunch account. If she spends $2.50 each day, which graph represents Lily's account balance, y, after she buys lunch for x days?

Respuesta :

galaxystarss
y = -2.5x + 45
^ That's your equation. Your y-intercept would be 45 because that's what she started with. It would be a negative slope as well.

Answer:

[tex]y=-2.50x+45[/tex]

Step-by-step explanation:

Lily has $45 in her school lunch account.

Let the days she buys lunch be = x

And each lunch costs $2.50

So, the equation to know Lily's account balance 'y' will be :

[tex]y=45-2.50x[/tex] OR in order, [tex]y=-2.50x+45[/tex]

The graph is attached below.

We can further see that $45 will go on for 18 days.

Ver imagen chisnau

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