If you want to check your calculations for a regression line and see the line then Excel and WolframAlpha are both very easy to use. In Excel – just add the data, insert a chart – choose Scatter, then add a trend line.
…or let WolframAlpha do all the work for you (including a plot)!
You could also use Desmos. Their video gives clear instructions:
For another example with an A Level question (using the same data as for Excel and WolframAlpha above) check this slideshow.