Question

why is it important to first visualize a scatterplot before determining the quadratic regression equation? its important to see if there are any points that are stacked vertically. its important to see how far apart the points are. the distribution may not be shaped like a parabola. the distribution may not be shaped like a line.

Explanation:

Quadratic regression is used for data that follows a parabolic (parabola - shaped) distribution. Visualizing a scatter - plot helps to check if the data has a parabolic pattern. If it doesn't, using quadratic regression would be inappropriate.

Answer:

The distribution may not be shaped like a parabola.