Question

What is the equation of the line that passes through the points (−2, 1) and (1, 10)?

3x − y = −7

3x − y = −5

3x − y = 5

x + 3y = −5

Answer 1

The anser would be the first one  (3x - Y =  -7)

Answer 2

slope = (10-1)/(1+2) = 9/3 = 3

y = mx + b
1 = 3(-2) +b
1 = -6 + b
b = 7

equation

y = 3x + 7
or
3x - y = -7

answer is 3x − y = −7 (first choice)