Stella can buy yogurt for $3 $ 3 a quart at the grocery store. She could also make yogurt at home for $1 $ 1 a quart after spending $24 $ 24 on a yogurt maker. The graph shows the cost of yogurt bought at the grocery store and made at home. On a graph, a line labeled Grocery goes through (0, 0) and (12, 36). A line labeled home goes through (0, 24) and (12, 36). CLEAR CHECK How should the x -axis be labeled? The x -axis should be labeled . How should the y -axis be labeled? The y -axis should be labeled . What does the slope of each line represent? The slope of each line represents the . What does the y -intercept of each line represent? The y -intercept of each line