You read: "A baker uses two blends of flour to make 100 pounds of dough." Which sketch and variable assignment best represents the mixture before writing equations?

• A. Draw two separate, unconnected circles and label them x and y. Each should be set equal to 100 when solving, with no relation between them.
• B. Write x + y = 200 right away, as a diagram is unnecessary for mixture problems and can obscure the underlying algebraic relationships.
• C. Draw a single rectangle labeled "100 lbs." Divide it into two adjacent parts: label one part "x" (pounds of blend A) and the other "100 − x" (pounds of blend B).
• D. Sketch a pie chart with three equal sectors and label each sector with the percentage of flour used. Do not assign variables, as the percentages will be estimated later.

Answer: (C)