Hello :
the line passes by O(0,0) : an equation is : y = mx
so : y=2x.....(<span>the equation of a line with slope m=2 and point (0,0))</span>
Boy that math stuff will kill a cracker
Answer:


Step-by-step explanation:
to figure out b we can consider the following formula:

the form of vertex coordinate given by

so according to the question

by order pair we obtain:

now substitute the value of h and a to the formula:

simplify multiplication:

cross multiplication:

divide both sides by -1:

now we need to figure out C to do so substitute -7 for x and -5 for y which yields:

simplify square:

simplify multiplication:

simplify addition:

cancel 49 from both sides:

hence,
we can use
volume of cone formula

where
r' is radius of cone
h' is height of cone
we are given
The radius of the cone is half the radius of the cylinder
so,

The height of the cone is equal to the radius of the cylinder
so,

now, we can plug values into formula
we get

we can simplify it

so, option-C.........Answer