Question

Choose the equation that represents the graph below.

y =-3/4 x + 4

y =-4/3 x + 4

y =3/4 x - 4

y =4/3 x - 4

My answer is y =4/3 x - 4
Am I right? :)

Answer 1

Work out gradient by doing change in y divided by change in x and find the y intercept by seeing where it crosses the y axis.

Answer 2

It crosses the y axis at 4 so you know it must be y=mx+4

Answer 3

You can also see that for every 3 it goes across on the x axis it goes down by 4 on the y axis. So that is -4/3 and that gives you the gradient. Meaning the answer is y=-4/3x + 4

Answer 4

Oh ok! Thank you do much! :)

Answer 5

That's ok, in future remember that if the line goes down then the number in front of the x must be negative.