Regina earned a grade of 88 on her first test and a grade of 79 on her second test. To the nearest tenth, what is the percent of decrease in Regina's test grades?

An unknown number x is at most 10. which graph best represents all the values of x? number line graph with closed circle on 10 and shading to the right. number line graph with open circle on 10 and shading to the right. number line graph with open circle on 10 and shading to the left. number line graph with closed circle on 10 and shading to the left.