Why did gregor mendel choose to use purebred plants in his experiments?

Rohit visited a pumpkin patch with his family. the table shows the relationship between the weight and price of a pumpkin. which statement describes the slope of a graph of the data? for each additional pound, the price increases $0.50. for each additional pound, the price increases $1.50. for every additional dollar, the pumpkin can increase by 1.5 pounds. for every additional dollar, the pumpkin can increase by 0.5 pounds.