The graph shows the death rate of the pneumonic plague in Europe during the 1300s. Pie chart of the death rate of the pneumonic plague during the 1300s. The chart shows the plague was 90 percent fatal.

Based on the graph, approximately how many people who got pneumonic plague died from it?

about 1 in 10
about 2 in 10
about 5 in 10
about 9 in 10

Which of the statements about the graph of the function y = 2x are true? check all of the boxes that apply. the domain is all real numbers x because the exponent of 2 can be any real number when the x-values increases by 1 unit, the y-value multiplies by 2. the y-intercept is (0, 1). the graph never goes below the x-axis because powers of 2 are never negative. the range is all real numbers.

List x1, x2, x3, x4 where xi is the midpoint endpoint of the five equal intervals used to estimate the area under the curve of f(x) between x = 0 and x = 10.

Match the one-to-one functions with the graphs of their inverse functions.