Difference between minimum points and values of a parabola (C1)Watch
I am answering the below past exam question.
For part (b) I have found the minimum point to be (1.5, 1.75) or in fractional form (3/2, 7/4).
The answer says it is just 1.75
I don't understand how this is the minimum value. I would get if it asked for the minimum y value but I am stumped as to why it would not be 1.5 (the x-value as it is lower).
Could someone please clear this up?
You can put in any (real) value of x you want, but you cannot possibly make the curve y have a value below 7/4 as you said (for real x).
The curve is y = f(x), so your y-coordinate would be the minimum value you'd want.