Question

在同一直角坐标系中画出下列函数的图像y=-2x-1,y=-2x,y=-2x+1

Answer 1

如果用matlab的话,大概是这样

x=0:0.01:10;

y1=-2*x-1;

y2=-2*x;

y3=-2*x+1;

plot(x,y1,'r');hold on;

plot(x,y2,'b');hold on;

plot(x,y3,'k');