See attached image. It's not just an answer...it's a full explanation. Please look through it to make sure you understand, and if anything isn't clear, don't hesitate to ask.
Do you have a graph or something for the percentage ?
Answer:
perp.: -1/3
y + 1 = -1/3(x - 4)
y + 3/3 = -1/3x + 4/3
y = -1/3x + 1/3
Step-by-step explanation:
Y= 2x-3
the slope of the line is 2, and b, the y-intercept, is -3
yes because you would subtract -9 from both sides of the equation leaving you with x = -4