# A-level c2

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#1
how would you draw a graph of y=3^x, y=-2^x and y=(1/2)^x on the same axis? This is to do with logarithms

1
5 years ago
#2
(Original post by itsyahg)
how would you draw a graph of y=3^x, y=-2^x and y=(1/2)^x on the same axis? This is to do with logarithms

What graphs have you covered in class?

These are examples of exponential graphs which all basically have the same shape (possibly reflected in an axis if multiplied by -1).
0
5 years ago
#3
These are log graphs(page 39 in my edexcel C2 textbook)- best way to draw/plot them is to do a table of values; so for y=3^x :when x is 1, y is 3 to the power of 1 which is 3; when x is 2, y is 3 squared which is 9 = points (1,3) and (2,9).

With these graphs they always go through the point (0,1) as anything to the power of 0= 1.These graphs have curves with an asymptote of y=0 ( the x axis). 0
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