Find the equation of the line passes through the points (-1,5) and (3,13)

y = 2x + 7

Step-by-step explanation:

→ Find the gradient

→ Write into y = mx + c format

y = 2x + c

→ Substitute in x = -1 and y = 5

5 = -2 + c ∴ c = 7

→ Write into y = mx + c format

y = 2x + 7

incomplete question. how do you expect anyone to you when you do not post the question in its entirety?

you didn't post any answer choices, so its not 100% clear what your teacher is looking for

however, log(15/7) is equivalent to log(15) - log(7)

i'm using the rule log(x/y) = log(x) - log(y)