Franks, a junior from Vancouver, Wash., contributed 25 points, nine rebounds and a career-high eight assists as the host Cougars won 83-62 to improve to 3-0.
Washington State made it to the WNIT semifinals last year and they return four starters and get a few players back from injury.
The Cougars practiced all offseason with a 12-second shot clock, taking a page from Creighton who ran them down early last season.
Arizona is the near-unanimous picked as Pac-12 favorites in preseason media poll.
UCLA tabbed as Pac-12 preseason favorites followed by Oregon, Stanford and Oregon State.
The second-team All-Metro League pick also had an offer from Washington.
The Richland High grad died Tuesday and was a three-time All-Star in Major League Baseball.