I need help with coding in MATLAB to plot a graph

I want to plot a graph of T against x for the equation T(d)=-Q/k*d+T_0 which is in the form of y=mx+c, where T_0 is the y-intercept with a value of 373 and x is 0:0.3. I have three gradients 0.1,10 and 100. I’m struggling to plot these three lines in one graph.