Your first point would be on (0, 2), the vertex. Then, put a point on (-2, 22). Hope that helps!
Firstly, let's create a function of f(t) where t represents the time that has past, and f(t) represents the amount of rainwater. We know that when t=1, then f(t)=10, and t=2 then f(t)=15. So, let's take that and analyze it:
(1,10)
(2,15)
m = (15-10)/(2-1) = 5
y-intercept = 5
∴ f(t) = 5t+5
Now we just evaluate t for 10:
f(10) = (5*10)+5
f(10) = 55
Answer:
Answer c: 
Step-by-step explanation:
Hi there!
Let´s start writting the formula

If we multiplicate both sides by (x₂ - x₁):

Then if we add y₁ to both sides of the equation:

Then, the right answer is the answer c)
Have a nice day!
Recall the angle sum identities:


Now,

Divide through numerator and denominator by
to get

Next, we use the fact that
lie in the first quadrant to determine that


So we then have


Finally,
