Dan builds identical model cars and sells them online. He records the number of models he complete every couple hours. The graph shows Dan's data. Choose two points on the line and calculate the slope.

Each year, Sandy measures the height of a tree growing in her backyard. The graph shows how much the tree grows each year. How much does the tree grow each year?

Ethan delivers newspapers during the week. The graph shows the number of newspapers her delivers. What is the slope / how many newspapers does he deliver in 1 day