Equation of a Line

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In the equation above, m is a constant. If when , what is the value of y when ?

Review: Equation of a Line


Explanation

In this question, the purpose of the first pair of x-y values is to allow us to solve for m. Then we can use the complete equation to solve for what is asked. So, step 1, to get m, we substitute into the equation:







Then we use m and the value of x we are given:





To check your answer, you could note that the equation is for a line with a slope of 6 and a downward offset of 3. That fits with both the first pair and second pair of coordinates.

The correct answer is (A).


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