The slope of the line is?

Find the measurement of angle b in the following triangle

*15 pts* the graph of an exponential function of the form y = f(x) = ax passes through the points and the graph lies the x-axis. first line choices: (0, a) (0, 1) (0, 2) (0, -1) second line choices: (1, 0) (1, a) (1, 1) (1, -2) third line choices: above below on the

For what values of a is the sum of the fractions 2a−1 / 4 and a−1 /3 positive?