Question

(3) The equation that represents graph (b) is _____

(4) The equation that represents a graph when graph (b) is shifted by -1 on the x-axis is _____

(5) The equation that represents a graph when graph (b) is moved symmetrically about a straight line y=x is _____

Answer 1

The graph is a graph of an exponential function passing through point (-1, 2). i.e. 2 = a^-1 = 1/a which implies that a = 1/2. Hence, the equation that represents graph (b) is y = (1/2)^x