Answer:

Step-by-step explanation:
→ Find the total number of people
5 + 14 + 1 + 3 + 15 = 38
→ Find the number of blue
3
I have attached the graph of y = -x + 1.5
The line goes through the points (0,1.5) and (1.5,0)
The vertex is at (4, -49) and the axis of symmetry is at x= 4.
To find the vertex of this equation, use this method:

a=2
b=-16
This will help get your x value and the axis of symmetry. To find the y value of the vertex, insert the x value, 4 to get your y value, -49.