I need help with questions 3 and 4. For #3, I solved everything except the explicit expression. I don't understand #4 at all. It doesn't seem to be linear, exponential, or quadratic. For #3, I got f(x)=2x+4 as the explicit expression. This however only solves for the first common difference. I would appreciate help solving this.

For #4, I had no clue what to do, so I put random stuff. I would appreciate help fixing it.

Thanks!

answer: i think it's a

step-by-step explanation:

the 4th choice is the correct one

step-by-step explanation:

answer: on graphs, the open and closed circles, or vertical asymptotes drawn as dashed lines us identify discontinuities.

as before, graphs and tables allow us to estimate at best.

when working with formulas, getting zero in the denominator indicates a point of discontinuity.

when working with piecewise-defined functions, check for discontinuities at the transition points where one piece ends and the next begins.

step-by-step explanation: