1) a line has a slope of 5. it passes through the points (1,4) and (6,y). what is the value of y? explain how you found your answer.

2) write a direct variation equation that relates x miles to y kilometers.

2 answers

on the 1,4 point
y=mx+b
4=5*1+b
b=-1

on the 6,y point
y=5*6-1=29
or
slope = (y-4)/5
= 5

(y-4)/5 = 5
y-4 = 25
y = 29
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