Question

vThe table below contains a list of ordered pairs.





x y
–2 7
–1 4
0 1
1 –2
2 –5








Which equation represents the relationship between x and y?




y
=
−
3
x
+
1


y
=
−
3
x
−
1


y
=
3
x
−
1


y
=
3
x
+
1

Answer 1

y = −3x + 1

Reason: As x increases by 1, y decreases by 3 (slope −3). Using (0,1) gives the y-intercept b = 1, so y = −3x + 1.