How do get this answer?

x = 45°

Step-by-step explanation:

Since it's a triangle, the total degrees of it would be 180

You are given one of the angles measurements and another's' supplementary angle

180 - 125 = 55

Take the 170 and subtract from 180 to get the interior angle of the triangle

180 - 170 = 10

Now subtract 55 and 10 to get x

55 - 10 = 45

the functions have the same rate of change i think. i narrowed it down to this answer and "the rate of change of tour 1 is greater" but i got it wrong using that answer so im assuming its the answer above. (this is a question i also answered from the iready site if anyone needs a reference)