Find the equation in slope-intercept form for the line passing through the points with the given coordinates. \[ (1,3),(-2,-1) \]
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To find the equation in slope-intercept form (y = mx + b) for the line passing through the points (1, 3) and (-2, -1), you first need to calculate the slope (m). The slope formula is: \[ m = \frac{y_2 - y_1}{x_2 - x_1} \] Plugging in the coordinates: \[ m = \frac{-1 - 3}{-2 - 1} = \frac{-4}{-3} = \frac{4}{3} \] Now that you have the slope, use one of the points to find the y-intercept (b). Using the point (1, 3): \[ 3 = \frac{4}{3}(1) + b \] This simplifies to: \[ 3 = \frac{4}{3} + b \] To isolate b, subtract \(\frac{4}{3}\) from 3: \[ b = 3 - \frac{4}{3} = \frac{9}{3} - \frac{4}{3} = \frac{5}{3} \] Now, you can write the equation of the line in slope-intercept form: \[ y = \frac{4}{3}x + \frac{5}{3} \]