The function of f(x)=-x+4x-3 is 3x-3. I hope this helps. :)
X≈1.5874
(Use the answer in the photo)
Straight line
Explaintion .
J

j=agv where a is a constant of proportionality.
j=1 when g=4 and v=5
1=a*4*5
1=20a
a=1/20
a= 0.05
j=0.05gv
When g=10 and v=9,
j=0.05*10*9
j=0.5*9
j=4.5