Question 2354
re-arrange it to the form you need, ie 1y equals, like so...

10y-12x=8
10y = 12x + 8
y = 1.2x + 0.8

so now, m=1.2 ie the gradient is +1.2 (just over 1). A gradient of 1 is a line at 45 degrees (for equal scales on the 2 axes)

jon