Question

13. Write an equation in slope intercept form given m = -25 and point ( 30.450)

Part B: If the input is 20 what is the output?

Answer 1

`(\stackrel{x_1}{30}~,~\stackrel{y_1}{450})\hspace{10em} \stackrel{slope}{m} ~=~ - 25 \\\\\\ \begin{array} \cline{1-1} \textit{point-slope form}\\ \cline{1-1} \\ y-y_1=m(x-x_1) \\\\ \cline{1-1} \end{array}\implies y-\stackrel{y_1}{450}=\stackrel{m}{- 25}(x-\stackrel{x_1}{30}) \\\\\\ y-450=-25x+750\implies \boxed{y=-25x+1200} \\\\\\ \stackrel{\textit{if x = 20, what's`