The sketch below shows the graph of f(x) = 2 x ax – 1. The point A(1; 5) is a point on the graph.
8.1 Show that a = 3. (2)
8.2 Determine the y-intercept of f . (2)
8.3 Write down the range of f . (1)
8.4 Determine f (0,23), rounded off to three decimal places. (2)
8.5 Write down the equation if f is reflected about the x-axis followed by a translation of 2 units to the left. (2)
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