How to find out particular value of t (j) at which y(j) is equal to some value lets say 4 (without looking graph) ? Thanks.

N=100;
dt=0.05;
k=2;
t=zeros(N,1);
y=zeros(N,1);
y(1)=2;t(1)=0;
for j=1:N-1
    t(j+1)=t(j)+dt;
    y(j+1)=y(j)+dt*(2+k);
end
plot(t,y)

Answer 1

[Star Strider]

Try this:

yi = 4
ti = interp1(y, t, yi)