Don't know which is worse, you moaning or your mother staring out the window, hoping someone will walk in and lay a shilling on the table. We have ugly days ahead of us. No sugar for anyone, rich or poor, no-no.”

I fanned myself with the wooden spoon. "Grandfather says this trouble will soon be over. He says people don't have gumption anymore."

Eliza mumbled something under her breath that I couldn't quite hear. When it came to strong-headed opinions, Eliza, my mother, and my grandfather were evenly matched.

—Fever 1793,
Laurie Halse Anderson

In what three ways does Mattie and Eliza’s dialogue show readers about history?

that everyone, both the rich and the poor, were affected by the epidemic
that teenagers were stubborn
that living through the epidemic was frustrating
that Eliza and Grandfather disagreed
that many businesses lost money during the epidemic

Overall, Mattie and Eliza's dialogue shows readers about the widespread impact of the epidemic on society, the teenage character's stubbornness, and the frustration and hardships faced by those living through the epidemic. Additionally, it highlights the economic struggles faced by businesses during this time period.