Find the slope of the line connecting the points (2, $47) and (24, $430):
$430 - $47
m = ------------------ = $17.41
24 - 2
She saved roughly $17.41 each week between weeks 2 and 24; she saved the same each week between weeks 2 and 4.
Kelly could buy 4 people the chicken salad, and two people the egg salad. The reason for this is that 4 x $5= $20 and 2 x $4= $8. So, when you add together the total price: $20+$8= $28; which is the exact amount of money she is willing to spend. This answer also fulfils the fact that more coworkers want chicken salad.
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