Reciprocate three supplied sketches

The given bowl has minimum $(0,a)$ with $a>0$ as drawn, no zeros, and outputs growing without bound at both ends. Its reciprocal stays positive, has no x-intercepts or vertical asymptotes, and tends to zero at both ends. No unique formula for the given curve is inferred.

The given graph has horizontal asymptote $y=a$, vertical asymptote $x=0$ and root $x=-1/a$, with $a>0$ as drawn. The root produces the reciprocal pole; the finite non-zero horizontal limit is inverted. The original domain excludes 0, so the reciprocal also excludes 0 even though both one-sided limits there are 0. The source labels $(0,0)$ and draws the curve through it; retain that printed claim in the native/review evidence and show an open hole in the mathematical sketch. There are no actual axial intercepts. No turning point is indicated.

The given sketch has local maximum $(-2,-4)$, local minimum $(1/2,2)$, vertical asymptote $x=-1$ and oblique asymptote $y=x$. Invert the non-zero turning-point heights. At either infinite end, f grows in magnitude along its oblique asymptote, so the reciprocal tends to 0. At the excluded input −1 the reciprocal tends to 0 but remains undefined; the source label $(-1,0)$ is a limit location, not an actual x-intercept. No zero of f is drawn, so no reciprocal vertical asymptote is indicated. The numerical y-intercept cannot be determined from the labelled features alone; no unique formula is inferred.