25. Several functions represent different savings account plans. Which functions are linear?
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The equation for the graph sketched below is
The given graph is an exponential graph and the standard exponential graph is expressed as
a is the y-intercept of the graph
(x, y) is any point on the graph.
Given the following from the graph;
a = -3
(x, y) = (1, 1)
Substitute the point and the y-intercept into the formula to have
Get the required exponential equation:
Recall that
Hence the equation for the graph sketched below is
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