HELP PLEASE
Scalene
Isosceles
Equilateral

1- Scalene triangle

2- Equilateral triangle

3- Isosceles triangle

4- Equilateral triangle

Here's the explanation if you need it :

For a scalene triangle, all the sides are different whereas an Equilateral triangle has equal sides. And finally for an Isosceles triangle, two sides are equal.

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value

probability for j is 1/4

while

a is 1/6