Question

when Angel left his house in the morning his cell phone battery was partially charged. Let B represent the charge remaining and Angels battery, as a percentage, T hours since Angel left his house. A graph of B is shown below. Write an equation for fee then State the slope of the graph and determine its interpretation in the context of the problem

Answer 1

$\begin{gathered} POINT\text{ 1 (0,}36\text{)} \\ \text{POINT 2 (}9,0\text{)} \\ Slope\text{ = }\frac{y2-y1}{x2-x1}=\frac{0-36}{9-0}=\frac{-36}{9}=-4 \\ \text{slope}=-4 \\ y=-4x+b \\ U\sin g\text{ point 1} \\ 36=-4(0)+b \\ 36=0+b \\ b=\text{ 36} \\ y=-4x+36 \\ \text{The equation is }y=-4x+36 \end{gathered}$