Scientists have collected significant evidence that shows the overall temperatures of the planet have been increasing steadily for many years. What questions could they ask to clarify this evidence? Select all that apply.

When did the change in climate start becoming dangerous to life on Earth?

How does the amount of ozone in the atmosphere today compare with the amounts 50 years ago?

How have the amounts of greenhouse gases changed over time?

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.