Formula for first order reaction, At=A0e−kt Here, At= concentration at time 't' A0= initial concentration ∴ A0−x=A0e−kt A0(1−e−kt)=x ∴ For[B]t=x [B]t=A0(1−e−kt) [B]t=A0−A0e−kt ...(i) On comparing the above equation with y=c+mx y=rate(R),x=time(t) Slope, m=1−e−kt (i.e. exponentially decrease) ∴ Graph is