Okay, so this is exponential. The formula for the exponental function is Y=ab^x
a is the y-intercept
b is the rate/ratio
x is the time
According to the graph, (remember the y-intercept is in the y-axis) so 2 is the y-intercept.
Knowing what the y-intercept is, you know what the answer is.
A.
Provide more details
Hope this helps
** where "r" is radius and "h" is height **

as it refers to the volume of cone being 1/3 of the the volume of cylinder
Hardest, example:
given height of cone is 69 km and radius is 48 km
using the formula:



First, multiply 1/2 and 2 by 6 to simplify the equation. Then, subtract 12 from both sides of the equation to get x alone. Finally divide both sides of the equation by 3 to get x on it's own. That is your solution. X=-2/3 I attached a picture of my work. Hope this helped!
If you were solving a system of equations and you come to a statement like 4 = 4 ( or 0 = 0 or 1 = 1 etc ) than you know that:
D ) There are infinitely many solutions.