Answer Happy

Based on the tables and graphs, is there supposed to be ay-intercept? What does it represent?
Fluid: Gasoline Trial 1 2 3 4 5 Trial Force before immersion 1 2 3 4 5 (N) 9.81 Fluid: Crude oil Force before immersion 9.81 9.81 9.81 9.81 (N) 9.81 9.81 9.81 9.81 9.81 Fluid: Fresh water Force after complete immersion (N) 9.4 8.4 7.5 7.0 6.3 Force after complete immersion (N) 9.1 8.0 7.4 6.5 5.7 Bottle Volume (ml) 100 216 315 400 506 Bottle Volume (mL) 100 229 317 410 512 Bottle Volume (m³) 1.00E-04 2.16E-04 3.15E-04 4.00E-04 5.06E-04 x-axis Bottle Volume (m³) 1.00E-04 2.29E-04 3.17E-04 4.10E-04 5.12E-04 x-axis Buoyant Force, Fb (N) 0.41 1.41 2.31 2.81 3.51 y-axis Buoyant Force, Fb (N) 0.71 1.81 2.41 3.31 4.11 y-axis Bouyant Force (N) 4.00 3.50 € 3.00 2.50 2.00 4.30 1.50 1.00 Bouyant Force (N 5.00 4.00 0.50 0.00 1.00 Bouyant Force vs. Bottle Volume (Gasoline) y = 7652x -0.2622 0.00E+00 1.00E-04 2.00E-04 3.00E-04 4.00E-04 5.00E-04 6.00E-04 Bottle Volume (m^3) Bouyant Force vs. Bottle Volume Crude Oil 3.00 y = 8259.5x -0.1202 2.00 0.00 0.00E+00 1.00E-04 2.00E-04 3.00E-04 4.00E-04 5.00E-04 6.00E-04 Bottle Volume (m^3)