Question

determine o coeficiente angular das retas que passam pelos potos A e B a(4,-1) e b(4,4)

Answer 1

$m=\frac{ya-yb}{xa-xb}=\frac{yb-ya}{xb-xa}\\m=\frac{-1-4}{4-4}=0\\\\0=\frac{y-yb}{x-xb}\\0=\frac{y-4}{x-4}\\\\y-4=0\\y=4\\y=ax+b\\a=0$