Question

What is the slope of the line that passes through the pair of points? (1, 7), (10, 1)

Answer 1

$(x_1;\ y_1);\ (x_2;\ y_2)\\\\the\ slope:m=\frac{y_2-y_1}{x_2-x_1}\\----------------------\\(1;\ 7);\ (10;\ 1)\\\\m=\frac{1-7}{10-1}=\frac{-7}{9}=-\frac{7}{9}$