(Modeling) In Exercises, assume that a linear relationship exists between the two quantities.
Solar Heater Production A company produces 10 solar heaters for $7500; 20 heaters cost $13,900.
(a) Express the cost y as a linear function of the number of heaters, x.
(b) Determine analytically the cost to produce 25 heaters.
(c) Support the result of part (b) graphically.
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