Question

Which is an equation of the line through (-1, –4) and parallel to the line 3x + y = 5?

Answer 1

3x + y = -7

Explanation:

The desired equation has exactly the same form as does the given 3x + y = 5 except that we must replace the 5 with a 'C' and find the value of 'C.'

Write out 3x + y = 5. Replace the x with -1, the y with -4. Calculate C:

3(-1) + -4 = C, or C = -7

the desired equation is 3x + y = -7