To find the formula for the points (1,5), (2,7), (3,9), and (4,11), we can determine the slope (\(m\)) of the line connecting these points.
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Use any two points to calculate the slope: \[ m = \frac{y_2 - y_1}{x_2 - x_1} = \frac{7 - 5}{2 - 1} = \frac{2}{1} = 2 \]
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Now we have the slope \(m = 2\). We can use the point-slope form of the line \(y - y_1 = m(x - x_1)\). Using point (1, 5): \[ y - 5 = 2(x - 1) \] Expanding this equation: \[ y - 5 = 2x - 2 \] \[ y = 2x + 3 \]
Thus, the formula that fits the points is: \[ \boxed{y = 2x + 3} \]