The bar graph below shows that as costs changed over the decades, a group of people devoted less of their budget to groceries. Percent of Total Spending Percentage of Total Spending on 30- 24- 18- 12- 6- 23% Food 17% 8% 6% 1950 1970 1990 2010 In 1950, the group spent 23% of their budget on food. This has decreased at an average rate of approximately 0.28% per year since then. Find a linear function in slope-intercept form that models the percentage of total spending, p(x), by the group x years after 1950. CH The equation p(x)=models the given description. (Use integers or decimals for any numbers in the expression.)