Answer:
i like your picture
Step-by-step explanation:
841 jumping jacks per 4 minutes

Divide both sides by 4.

Delilah can do 210.25 (or 210) jumping jacks per minute.
Answer:
f(x) = 4x + 4
Step-by-step explanation:
When a line is parallel to another line, the slopes are always equal. Therefore, the coefficient for x has to be four. If you multiply the y-coordinate by 4, you get 4. To get 8, you have to add four, so the equation is simply f(x) = 4x+4.
That would be : y = 2x + 1