1. Which graph displays a set of data for which an exponential function is the model of best fit?

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this

you'll have to attache the image of the bar graph in order for us to answer : )

step-by-step explanation: