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

3x-y = -7. we can do by 2 ways. one way is the two points should satisfy the equation. so we can get the line from options easily.

other way is y-y1 = m(x-x1)=> y-1 = [(10-1)/ (1+2)] (x+2) => 3x-y = -7