Using the equation given, where does the line cross the y-axis? y=3x-9

The equation of any straight line can be written as in slope intercept form as -

where,

Comparing the equation y = 3x -9 with the standard form of the equation, we get -

Thus, the line cross the y-axis at (0,-9) .

plants store their excess carbohydrate in the form of starch so that it could be used as energy source later on. the excess carbohydrate is converted into starch in the plastid i.e. chloroplast & this process occurs in the presence of sunlight. it is an insoluble polymer of glucose which gets stored in cell organelles named as amyloplasts. in some plants, starch is also stored in roots and embryos.