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There are several equations for power. For example, the definition of power: P = work/time Specifically for electricity, the following equations are often used: P = I2R P = V2/R
The Cartesian plane is important inasmuch that it is used in coordinated geometry for plotting straight line equations as an example
Multi-step equations can be used in various real-life situations. For example, when planning a budget, multi-step equations can be used to calculate monthly expenses and income. They can also be used in engineering and physics to solve complex problems involving multiple variables and equations. Additionally, in chemistry, multi-step equations are used to balance chemical reactions and determine the quantities of reactants and products.
Equations are used to give a mathematical analysis of events or situations in the real world.
Slope = change in y (distance) / change in x (time). If the graph is not a straight line then either apply the above formula to the tangent at the point of interest or differentiate the equation of the graph.