Which value is represented by the slope of the line?

85 g/cm^3
17.5 g/cm^3
9.0 g/cm^3
8.5 g/cm^3

The slope of the line is

(change in ' y ' between the ends)  /  (change in ' x ' between the ends)

Slope = (630g - 0) / (70 cm^3 - 0)

Slope = (630 / 70) g/cm^3

Slope =  9.0 g/cm^3

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the temperature and the pressure affect solubility. temperature affects by changing the properties of the solvent. the increase in pressure increases solubility, the decrease in pressure decreases solubility.