Answer:140 C
Step-by-step explanation:
In y = mx + b form, the slope will be in the m position and the y int will be in the b position
y = 6x - 5.....the slope is 6. A parallel line will have the same slope
with a y int of 7....
y = 6x + 7 <===
Slope is rise over run so
(21-18)/(6-3), 3/3=1, slope is 1
plug in to find b value
18=3+b, b=15
ANSWER: y=x+15
Move the decimal right 3 times