[Solved] The presence of white spots on interproximal surfaces are usually first identified in radiographs because mesial and distal surfaces are NEVER visible to the naked eye. A)Both statement and reason are true. B)Both statement and reason are false. C)Statement is true but reason is false. D)Statement is false but reason is true. Scattergraph: A graphical representation that displays the relationship between two variables, often used in statistics and data analysis. High-Low Method: A technique used in cost accounting to determine the variable and fixed components of a company's cost structure by analyzing the highest and lowest levels of activity. Variable Costs: Costs that change in proportion to the level of activity or volume of production in a company, such as raw materials and labor costs. Fixed Costs: Fixed costs are business expenses that remain constant regardless of the level of production or sales, such as rent, salaries, and loan payments.