Answer: y=3x-9
Step-by-step explanation: To solve this, you'd first have to substitute 5,6 into an equation (you know that slope in standard form is y=mx+b, where m is slope and b is figure 0, or the y intercept), you have an x and a y. Then solve.
y=mx+b (y=6, m=3, and x=5)
6=3(5)+b --- Substitute values
6=15+b --- Subtract 15 from both sides (solving for b)
6-15=-9
b=-9
Hope this helps; let me know if you need further elaboration, as this is kind of hard to grasp at first.
Sincerely,
Lacia :)
