Question

Which linear function represents the line given by the point-slope equation y + 1 = –3(x – 5)?

f(x) = –3x – 6
f(x) = –3x – 4
f(x) = –3x + 16
f(x) = –3x + 14

Answer 1

Start with y + 1 = −3(x − 5).
Expand: y + 1 = −3x + 15, so y = −3x + 14.

Thus f(x) = −3x + 14.