SOLUTION: A vendor has learned that, by pricing pretzels at $1.00, sales will reach 92 pretzels per day. Raising the price to $1.50 will cause the sales to fall to 72 pretzels per day. Let y

Algebra ->  Finance -> SOLUTION: A vendor has learned that, by pricing pretzels at $1.00, sales will reach 92 pretzels per day. Raising the price to $1.50 will cause the sales to fall to 72 pretzels per day. Let y      Log On


   

Question 1084633: A vendor has learned that, by pricing pretzels at $1.00, sales will reach 92 pretzels per day. Raising the price to $1.50 will cause the sales to fall to 72 pretzels per day. Let y be the number of pretzels the vendor sells at x dollars each. Write a linear equation that models the number of pretzels sold per day when the price is x dollars each.
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
Linear points (x,y) are (1, 92) and ( 1.5, 72 ).

slope, %2872-92%29%2F%281.5-1%29=-20%2F0.5=-40
vertical axis intercept, 92-%28-40%29%2A1=132
highlight%28y=-40x%2B132%29





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check:
92=-40%2A1%2B132
92=132-40
92=92
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72=-40%2A1.5%2B132
72=72
check works.