Step-by-step explanation:
but the graph is not given here
1. 25 because you have to multiply 5x5
2. 1 because you have to multiply 1 six times.
3. 27 because you have to multiply 3, 3 times.
Check the picture below.
about ∡QML
well, QM is a diameter chord, and LM is a tangent line, the point of tangency is always a right-angle, as you see it in darkred there.
about ∡PMN
well, first off, let's notice the inscribed angle of 27°, by the inscribed angle theorem, that means the intercepted arc is twice that much, as you see it there in green.
QM is a diameter, so the arcQPM is 180°, if we subtract the 54° from arcPQ, we're left with the arcPM you see there of 126°.
by the tangent-chord angle theorem, ∡PMN is half of arcPM.
For the equation you gave, which is y = a(b)^x, increasing the b value would increase how much more the y value would increase/decrease (depending if x is > or < 0). Please view the image attached!