Posted by **Lee** on Monday, December 6, 2010 at 7:17pm.

a company finds it can produce 15 heaters for $4300, while producing 20 heaters costs $5500. Express y, as a linear function of the number of heaters, y. Determine the cost to produce 30 heaters.

y = _________

Cost to produce 30 heaters $_________

Help I'm not sure how to solve this problem. Thank you

- College algebra -
**bobpursley**, Monday, December 6, 2010 at 7:27pm
y=mx+b

4300=m*15+b

5500=m*20+b

subtract the first from the second

1200=5m

m= you solve it. THen put it in either equation, and solve for b.

- College algebra -
**Lee**, Monday, December 6, 2010 at 9:17pm
Thank you so much. I can't believe it was so simple..:):)

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