Celeste injured her ankle in a soccer game and cannot run for an extended period of time. the doctor recommends swimming to minimize which principle? specificity progression overload reversibility

Reversibility principle

Explanation:

Celeste injured her ankle hence cannot play soccer and practice for some time. According to reversibility principle if a trained athlete stops training for sometime, they might lose the skills which they had acquired while training. The effects of the training will be negated. To avoid this situation and still not put much burden on her ankles, she is suggested to swim by doctors. Swimming would keep her legs active and still not put much pressure on her ankles.

answer-

the statement that f(x) = |x+a| + b has exactly one x-intercept is sometimes correct.

solution-

it solely depends on b, whether the function will have one or two or zero x intercept.

this plot of the given function, f(x) = |x+a| + b will be the basic absolute value graph i.e v shape, with vertex translated to (-a, b), instead of origin.

1-   if b is zero, the graph will have exactly one x-intercept, at x= -a

2- if b is positive, the whole graph will be above the x-axis, hence it will have no x-intercepts.

3- if b is negative, the graph will be below the x-axis, hence it will have two x-intercepts.

∴ the statement is sometimes true.