The relationship between the number of $4 lunches you buy with $100 lunch card and the money remaining on the cards.
1 answer:
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Answer:
y = -x
Step-by-step explanation:
The line has a slope of -1 and it passes through point (0,0)
Taking another point (x,y) on the line;
Slope = change in y ÷ change in x
For our case; slope =
Cross multiplying this gives;
y = -x