Find the equation of a line that is parallel to the line y = −3x and contains the points (9,−4).

Question

Nicola

Answer 1

so the new line must look like
y = -3x + b, that is, it must have the same slope of -3
plut in the point:
-4 = -3(9) + b
23 = b

y = -3x + 23