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?
2 answers:
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.
Y <span>= -2.50x
(it is negative cuz she is takig out 2.50 each day so her balance is decreasing)
45 </span><span>= -2.50x
</span><span>
so she could by 18 lunches
so since there are no graphs, its the graph with (18,0) as a valid point and a slope of -2.5. hope this makes sense and helps</span>
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