Which is more predictable, a volcanic eruption or an earthquake? Explain why. This question is a science question but whatever

Volcanic eruptions are more predictable

Both volcanic eruptions and earthquakes are measured by seismographs but volcanic eruptions are easier to notice because of where tectonic plates move(hotspots). If their is an opening  between plates over a hotspot a volcano can form and eventually erupt.

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.