Plugging in points

Q:  Consider the equation: Cw= 35 + 4n. Is (65,295) a solution to the equation?

A:  If something is a solution to the equation, you are supposed to be able to plug the numbers into the equation to see if they work.  Generally, the first number is the “x” and the second number is the “y”.  In our case, the first number is the “n” and the second number is the “C”… How did I know this?  Experience.  The first number (65) is the independent variable (the one used in the equation).  The second number (295) is the dependent varible:

So,

Cw= 35 + 4n

295 =? 35 + 4(65)

295 =? 35 + 4(65)

295 =? 35 + 260

295 =? 295

Since the answer is true (295 = 295), that means the data point is a solution to the equation.

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