Question2 Mark for Review
Which of the following statements is true about the exponential function $h$ given by $h(x)=-3 \cdot 4^{x}$ ?
A $h$ is always increasing, and the graph of $h$ is always concave up. (B) $h$ is always increasing, and the graph of $h$ is always concave down. (C) $h$ is always decreasing, and the graph of $h$ is always concave up. (D) $h$ is always decreasing, and the graph of $h$ is always concave down.