2. Purata bilangan panggilan telefon harian, C, di antara dua buah bandar berubah secara langsung dengan populasi kedua-dua buah bandar, P1 dan P2, dan secara songsang
dengan kuasa dua jarak, j, di antara dua buah bandar tersebut. Jarak di antara bandar A
dengan bandar B ialah 210 km. Purata bilangan panggilan telefon harian di antara dua
buah bandar itu ialah 15 750 dan populasi bandar A dan bandar B masing-masing ialah
105 000 penduduk dan 220 500 penduduk. Dengan memberikan jawapan kepada nombor
bulat terhampir, hitung
(a) jarak di antara bandar P dengan bandar Q jika populasi masing-masing ialah
83 400 penduduk dan 62 000 penduduk dan purata bilangan panggilan telefon
harian ialah 19 151,
(b) populasi penduduk bandar J jika populasi penduduk bandar K ialah 1 100 000
penduduk dengan jarak di antara dua bandar tersebut ialah 351 km. Purata bilangan
panggilan telefon harian di antara bandar J dengan bandar K ialah 18 857.​

17   x 256=4352

sorry if this is wrong, i'm new.

step-by-step explanation:

the first one

step-by-step explanation:

just id the test.

let's cover over the formula of the vertex:

y = a(x – h)^2 + k

in this formula, (h,k) are the vertex, always remember that the positive or negative value of the vertex is based on the sign it has.

for example, if the vertex is -3,-6 then both the x and y value would have the positive sign attached to it and if it were a positive x and y value, then a negative sign would be attached to it.

with that being said, for our problem the x value is a positive one so we are looking for a number with a negative sign next to it, in this case the first and second choice.

however, for the first answer choice it isn't quite part of the formula so we know that the answer choice correctly displays the x value.

to confirm, we can see if the -1 fits correctly with the second answer choice, and as mentioned above a negative number will have a positive sign attached to it. so, for our problem we can see that -1 has been changed to +1, so we can confirm that the second answer choice is correct.

hence, our final answer is y=(x - 1)^2 + 1