exam Maths Puzzle Numerical Ability

Which does not represent a possible intersection of a line and a triangle?:
0 points
1 point
2 points
3 points

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exam Other Question

Please help me with this question.

X 1 3 6
Y 3 9 t

The table above shows a relation of the form y = kx` + c where k and c are constants.

calculate the value of t. I do not know what the name of this type of problem is...what does the ~ above a small letter "a" mean with a blank box next to it and then the rest of the equation?