The y-intercept of a parabola is 1, and its vertex is at (1,0). what function does the graph represent

f(x) = (x − 1)2

Step-by-step explanation:

  Equation of function,   y = (x-1)²

Step-by-step explanation:

The general formula of a parabola symmetric about x - axis is given by (x-h)²=4a(y-k), where (h,k) is the vertex.

Here (h, k) = (1,0)

So, we have (x-1)²=4a(y-0)

                    (x-1)²=4ay

One point on the parabola is (0,1) since y intercept is 1.

Substituting

         (0-1)²=4 x a x 1

           1 = 4 a

Equation of parabola,

Equation of function,   y = (x-1)²

36 girls

step-by-step explanation:

the 48 boys is 4 parts of the ratio

divide 48 by 4 to obtain one part of the ratio

= 12 ← 1 part of the ratio

3 parts = 3 × 12 = 36 ← number of girls

30005

yes ok