Answer:
Y= 1/3x + 4
Step-by-step explanation:
4 is the y intercept and it goes across one and down 3 for the get the slope of 1/3.
I believe just 1 because an equilateral triangle can only be reflected on one line for the halves to be the same
The fourth number is 51. 48+49+50+51= 198.
THE NUMER IS 48