Look at the graph Choose the correct equation from the following which best suited to the above graph

• A

  $\left[A_t\right]=[A]_0-K t$
• Correct answer
  B

  $\left[A_t\right]=[A]_0+K t$
• C

  $\left[A_t\right]=\left[A_0\right] e^{-K t}$
• D

  $\left[A_t\right]=K t^2+\left[A_0\right]$

Solution

The equation is $\left[A_t\right]=\left[A_0\right]+K t$ On comparing it with general straight line equation, $Y=m x+c$ $\begin{aligned} \text { Slope }(m) & =+K \\ \text { intercept }(c) & =\left[A_0\right]\end{aligned}$ Therefore,the graph is

Hence, the correct answer is option: 'B'.