Which of these are less steep?

y=5x+6
y=5x-6
y=x-3
y=x+3

I think it is one of the last two, but I do not know

2 answers

"steepness" is measured by the absolute value of the slope, m, used in the standard linear equation
y=mx+c
The greater the value of m, the "steeper" is the curve.
If you transform/interpret equations to the above form and compare the values of m in each case, you will find which line is steepest.
what does find the unit rate mean