Question

Write a linear function f with the values f(-9) = 8 and f(-9) = 8 and f(0) = 1

Answer 1

`\begin{gathered} x_1=-9,y_1=8,x_2=0,y_2=1 \\ y-y_1=(y_2-y_1)/(x_2-x_1)(x-x_1) \\ y-8=(1-8)/(0+9)(x+9) \\ y-8=-(7)/(9)(x+9) \\ 9y-72=-7x-63 \\ 9y=-7x+9 \\ y=-(7)/(9)x+1 \end{gathered}`