Eric Nicholas K's answer to Lee Meimei's Secondary 3 E Maths Singapore question.
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Here are my workings for this question.
The downward-going graph should not have the equation y = k (3^x) because the graph of this equation is upsloping and fully above the y-axis for positive values of k and downsloping and fully below the y-axis for negative values of k.
A correct equation for such curves is y = k (3^-x).
The downward-going graph should not have the equation y = k (3^x) because the graph of this equation is upsloping and fully above the y-axis for positive values of k and downsloping and fully below the y-axis for negative values of k.
A correct equation for such curves is y = k (3^-x).
Date Posted:
4 years ago
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