An exponential function is graphed below. 
  Activity 1 of 2 
Which equation could represent this graph? 
A. Y=2x
B. y = -2x 
C. y=2‐x 
D. y=x²-2
Eric doesn't have a graphing calculator. Explain to Eric how he could have determined the answer to Part A without a calculator.
                                             
                                          
                                          
                                        
											