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) .

for this case we have that by definition, the surface area of a cylinder is given by:

where:

r: it is the radius of the cylinder

h: it is the height of the cylinder

we can also rewrite it as:

where:

la: it's the lateral area

ba: area of the base

option a

d is ur answer hopes this i dont really know how to explain it to u.