# mutiply x axis by a factor

i have this equation

 (3.47471*10^31 (3.525 + 3.83003*10^-10 F^2))/(0.5814 +
9.89982*10^-10 F^2 + 1.05946*10^-20 F^4)


i can plot it simply. however i want to multiply x and y axes by a desired factor, i can do it for y axis, how can i modify the x axis?

Plot[Evaluate[{10^-9 \[Kappa]e}], {F, 0, 2 10^17},
PlotRange -> {Automatic, {0, 10}}, Frame -> True, AspectRatio -> 1,
FrameLabel -> {"B/\[Rho](G.\!$$\*SuperscriptBox[\(cm$$, \
$$2$$]\).\!$$\*SuperscriptBox[\(g$$, $$-1$$]\))",
"(\!$$\*SubscriptBox[\(\[Kappa]$$, \
$$e$$]\))\[Times]\!$$\*SuperscriptBox[\(10$$, \
$$9$$]\)(\!$$\*SuperscriptBox[\(cm$$, $$-1$$]\).\!\
(\*SuperscriptBox[\
$$s$$, $$-1$$]\))"},
FrameStyle -> Directive[Bold, Black, (FontSize -> 15)],
PlotLegends ->
Placed[LineLegend[{Style[
"\!$$\*SubscriptBox[\(\[Kappa]$$, $$i$$]\)", "Times", 15,
Bold]}], {0.85, 0.85}],
PlotStyle -> {Blue, Directive[Red, Dashed]}]


There are perhaps more elegant answers, but let's say you want to scale the x-axis by 10^17. Then this would do that:

equation1[
F_] := (3.47471*10^31 (3.525 + 3.83003*10^-10 F^2))/(0.5814 +
9.89982*10^-10 F^2 + 1.05946*10^-20 F^4);
Plot[10^-9 equation1[10^17*F], {F, 0, 2},
PlotRange -> {Automatic, {0, 10}}, Frame -> True, AspectRatio -> 1,
FrameLabel -> {"10^17 * B/\[Rho](G.\!$$\*SuperscriptBox[\(cm$$, \
$$2$$]\).\!$$\*SuperscriptBox[\(g$$, $$-1$$]\))",
"(\!$$\*SubscriptBox[\(\[Kappa]$$, \
$$e$$]\))\[Times]\!$$\*SuperscriptBox[\(10$$, \
$$9$$]\)(\!$$\*SuperscriptBox[\(cm$$, $$-1$$]\).\!\
(\*SuperscriptBox[$$s$$, $$-1$$]\))"},
FrameStyle -> Directive[Bold, Black, (FontSize -> 15)],
PlotLegends ->
Placed[LineLegend[{Style[
"\!$$\*SubscriptBox[\(\[Kappa]$$, $$i$$]\)", "Times", 15,
Bold]}], {0.85, 0.85}],
PlotStyle -> {Blue, Directive[Red, Dashed]}]


This returns this graph:

• thank you very much, it did help. – user68857 Mar 3 '20 at 9:38