Question

Tan of a d
y=1-5x^2 at P(-5,-124)
I know
m=50 by the derivative formula
problem is not sure what this means

slope is also (y-(-124))/(x-(-5))
50=(y-(-124))/(x-(-5))
slope intercept form
y=50x+126
How did they find b?

Answer 1

Once you know the slope is 50 you can take you point (-5,-124) and plug into y =mx+b:

\[-124=50(-5)+b\]
\[-124+250=b\]
\[126=b\]

Answer 2

can you complete the square with only two terms? I did not think so.

Answer 3

thank you

Answer 4

yw