Question

Which of the following is the correct point-slope equation for the line that passes through the point (-6, -1) and is parallel to the line given by y = 7x + 31?

Answer 1

A. y + 1 = 7(x + 6)

Explanation:

1) Point slope form is

y - y1 = m(x - x1)

where m is the slope and (x1, y1) is a point on the line

2) Parallel lines have the same slope

in this case m = 7

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Plug in m = 7 and (x1, y1) = (-6, -1)

y + 1 = 7(x + 6)

which is answer A