I think you set up the equation like this
$2.50x+5
I hope I helped sorry if I didn't.
The word probability has 11 letters, there are 2 b's, so, the probability you are asking for is P= 2/11.
We have two points so we can find the gradient using y1-y2/x1-x2
gradient = 21-27/2-8
= 1
we know the form for any linear equation is y = mx + c
we have m and a point so we can substitute in point (2,21) to find c
21 = 1 x 2 + c
c = 19
therefore, the equation is y = x + 19
It would be D)
Hope this helps
