A vendor has learned that, by pricing pretzels at $1.75, sal…

A vendor has learned that, by pricing pretzels at $1.75, sales will reach 84 pretzels per day.  Raising the price to $2.25 will cause the sales to fall to 58 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.