B. y=12x+7
Explanation
The slope is 12; slope=m
The yint is 7; yint=b
The equation of a line is set up as so
y=mx+b
Now we just need to replace the variables with the numbers
y=12x+7
The answer is y =3x
Explaining
y= 3*-3
y=-9
<span> joint variation
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I'm not sure but I think, f(s)=-4[x]-3
Hi there
Miles driven=
(1,100+800)÷0.14
=13,571 miles
Hope it helps
