To see whether linear regression is suitable for any given data, a scatter plot can be used. If the relationship looks linear, we can go for a linear model. But if it is not the case, we have to apply some transformations to make the relationship linear. Plotting the scatter plots is easy in case of simple or univariate linear regression. But in the case of multivariate linear regression, two-dimensional pair-wise scatter plots, rotating plots, and dynamic graphs can be plotted.
