Let's analyze each of the points.
f has a relative minimum at x = 2. (TRUE)
When a function's slope is zero at x, and the second derivative at x is: less than 0, it is a local maximum. greater than 0, it is a local minimum.
f is concave up from x = -1.5 to x = 1.5. (FALSE)
When it concaves up we're looking for when the second derivative is positive which means the slope of the first derivative is positive
f has an inflection point at x = 1.5. (TRUE)
So it's also the situation where we're going from negative to positive or for the first derivative is going from decreasing decreasing to increasing decreasing to increasing well
