iam trying to make a function for graph

function D=MQ(a,b,c,x1,x2,q,w,e,x3)
x=(x1:0.1:x2);
for j=1:length(x)
M(j)=a*x(j)^2+b*x(j)+c;
end
y=(x2:0.1:x3)
for i=1:length(y)
M(i)=q*y(i)^2+w*y(i)+e;
end

figure(1)
fplot(@(x) M(j))
hold on
fplot(@(y) M(i))
hold off
grid on

Answer 1

[Cris LaPierre]

https://www.mathworks.com/learn/tutorials/matlab-onramp.html