a small liquid droplet is 'struck' by a sound wave resulting in an oscillation of the droplet with frequency f. I then have to graph log f and log r. do I just log each value then plot it and find the gradient and y intercept? if the equation is f=kr^a does a equal the gradient. what is k then? please help guys!

Is this what you are trying to do In a laboratory experiment a small liquid droplet is 'struck' by a sound wave resulting in an oscillation of the droplet with frequency which seems to depend on the radius of the droplets. A table of these values appears here. You should plot a graph of log f vs log r ON LINEAR GRAPH PAPER and use your graph to answer THIS question AND the following question.

any tips on how I can use the garph to figure out the equation? All I did was log both values then find the "line of best fit" this gave me a -gradient and my y intercept was +3.795

is the -gradient the "a" value and is the +3.795 the Y intercept?

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