1) Using these 7 sets of data, add up (left to right) than divide the sum by 3 and make a bargrapgh

2) the barograph should include all 7 sets of data

3) the title is "Absorbance Values for physiology - effect of Na Cl Concentration

4) y axis needs to be called " absorbance " , and x axis needs to be called "salt concentration (M)"

for example 0.001 + 0.002 + 0.000 / 3 = 0.001