If a line crosses the y-axis at (0, -3) and has a slope of 3, what is the equation of the line?

Asap! i'm not good math and i'm lost.

The population of a small rural town in the year 2006 was 2,459. the population can be modeled by the function below, where f(x residents and t is the number of years elapsed since 2006. f(t) = 2,459(0.92)

Using only odd number for numerators write two different subtraction problems that have a difference of 3/4