sry latex didn't work for me
the equation we have is:
1.25L=5+2
1.25L=7
L=7/1.25
L=5+(0.75/1.25)
she will have 0.75 left
it's a little diffucult to show here, but when graphing it you can find the slope is (1-2)/(1-(-1)) or -1/2 and the "height" is 1.5 so the equation is
y=-1/2x+1.5
