- What is the value of k in the equation y = kx + 2, if y = 12 when x = 4?
The answer is 3. Substituting x = 4 and y = 12 into the equation y = kx + 2, we get:
12 = k(4) + 2
12 = 4k + 2
10 = 4k
k = 10 / 4 = 3.
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