The bar graph shows that as costs changed over the decades, Americans devoted less of thei...

The bar graph shows that as costs changed over the decades, Americans devoted less of their budget to groceries and more to health care.

Source: Time , October 10, 2011

In Exercises, find a linear function in slope-intercept form that models the given description. Each function should model the percentage of total spending, p(x), by Americans x years after 1950.

In 1950, Americans spent 3% of their budget on health care. This has increased at an average rate of approximately 0.22% per year since then.