The period of a wave is found to be 50 seconds. what is the frequency of the wave?

If you remember this one rule, then you can always convert
in either direction between frequency and period.

           (Frequency) times (Period)  =  1 .

So Frequency = 1 / period

                         =  1 / (50 seconds)

                         =  (1/50) per second

                         =   0.02 per second

                         =  0.02 Hertz  

No because scientist are still changing there mines today so they are not correct to this day

There is no graph to look at on here, but i shall explain them to you. a line graph is just in its title it’s a graph with a line running through the dots to show an increase or decrease. a bar graph is used to show how much or how little something is so a comparison. a scatter plot is used to graph points to tell the data. and i don’t know what a histogram is.