Photo-electrons (μmol) G-value (RGB light units) 0.025 0.05 0.075 0.1 0.125 0.15 43 85 128 170 213 255 A digital camera measures the number of micromoles (μmol) of photo- electrons of green light. A programmer creates a function that assigns a whole number G-value (another measurement of green light) from 0 to 255 based on the photo-electrons, as shown in the table. Which of the following best describes the relationship between the number of photo- electrons and the G-value?​