What do the slope and y-intercept mean? Group of answer choices The slope of 60 tells how much the sitting height increases for each 1 year increase in age. The y-intercept is 50 cm and gives the sitting height when the age is 0 years. The slope of 60 tells how much the sitting height increases for each 1 year increase in age. The y-intercept is 0 cm and gives the sitting height when the age is 0 years. The slope of 2.5 tells how much the sitting height increases for each 1 year increase in age. The y-intercept is 0 cm and gives the sitting height when the age is 0 years. The slope of 2.5 tells how much the sitting height increases for each 1 year