If \( (-2,11) \) and \( (9,22) \) are two anchor points on a trend line, then find the equation of the line. \[ y=[?] x+ \]
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To find the equation of the line passing through the points \((-2,11)\) and \((9,22)\), we first need to determine the slope. The formula for the slope \(m\) between two points \((x_1, y_1)\) and \((x_2, y_2)\) is given by: \[ m = \frac{y_2 - y_1}{x_2 - x_1} \] Plugging in our points, we have: \[ m = \frac{22 - 11}{9 - (-2)} = \frac{11}{11} = 1. \] Now, using the slope-intercept form of the equation \(y = mx + b\), we can substitute \(m = 1\). Next, we need to find the y-intercept \(b\). We can do this by using one of the points, say \((-2, 11)\): \[ 11 = 1(-2) + b \implies 11 = -2 + b \implies b = 11 + 2 = 13. \] Thus, the equation of the line is: \[ y = 1x + 13. \] Or simply: \[ y = x + 13. \] So, the final answer is: \[ y = 1x + 13. \]