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Question
what is the equation of the trend line in the scatter plot? use the two blue points to write the equation in slope - intercept form. write any coefficients as integers, proper fractions, or improper fractions in simplest form.
Step1: Encontrar la pendiente \(m\)
La fórmula de la pendiente es \(m=\frac{y_2 - y_1}{x_2 - x_1}\). Tomando los puntos \((4,9)\) y \((8,2)\), entonces \(m=\frac{2 - 9}{8 - 4}=\frac{-7}{4}\)
Step2: Encontrar la ecuación en forma \(y=mx + b\)
Usando el punto \((4,9)\) y \(m =-\frac{7}{4}\), sustituimos en \(y=mx + b\): \(9=-\frac{7}{4}(4)+b\). Resolviendo: \(9=-7 + b\), entonces \(b = 16\)
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\(y=-\frac{7}{4}x + 16\)