Fiona has proved that a function, f(x), is an arithmetic sequence. how did she prove that?

she showed that an explicit formula could be created.
she showed that a recursive formula could be created.
she showed that f(n) ÷ f(n − 1) was a constant ratio.
she showed that f(n) − f(n − 1) was a constant difference.

Me. i can't figure out this question. give an explanation too. .

Consider this equation. |y + 6| = 2 what can be concluded of the equation? check all that apply. there will be one solution. there will be two solutions. the solution to –(y + 6) = 2 will be also be a solution to the given absolute value equation. the solution(s) will be the number(s) on the number line 2 units away from –6. the value of y must be positive since the variable is inside absolute value signs.

Find the zeros of each function. f(x) = x^2 + 5x - 6