Jack Twilley wrote:

. . .
Frequency Resistance Reactance Impedance
7.00 14 6 15.2
7.05 18 15 23.4
7.10 18 21 27.7
7.15 21 20 29.0
7.20 24 27 36.1
7.25 28 36 45.6
7.30 28 43 51.3

. . .

The impedance is well within a 2:1 match throughout the voice segment,
and a 3:1 match across the entire band.

Assuming a 50 ohm system, the SWR for each of your impedances is shown
in the SWR column below. You might want to review how SWR is calculated
-- the ARRL Antenna Book is a good source.

Frequency Resistance Reactance Impedance SWR
7.00 14 6 15.2 3.63
7.05 18 15 23.4 3.06
7.10 18 21 27.7 3.33
7.15 21 20 29.0 2.83
7.20 24 27 36.1 2.82
7.25 28 36 45.6 2.93
7.30 28 43 51.3 3.37

Roy Lewallen, W7EL