text: graphing logs? f(x)= -2 + log2 x  please explain to me how to find the points to graph my teacher hasnt went over it and i dont understand it the same way you graphed others: substitute for x, solve for y in this case try x values that will give you a whole number for the logarithm. you should notice a steep curve on the graph like an exponential graph.  the log2 (x) means 2^(what power?)=(your x input)  for example, if you have x as 1, you will get -2+0=-2 for y                                  if x is 4, you get -2+2=0 for y                                  if x is 8, you get -2+3=1 for y