Question

How do you solve this problem? The answer is attached as an image.

Answer 1

to get the gradient, you must differentiate the function, and then substitute in the x value to get the gradient at that point

then to get the B value you must use the formulat
y-y1=m(x-x1)

where y1 is the y ordinate, m is the gradient, and x1 is the x ordinate, of the given coordinate set

Answer 2

when i wolfram alpha'd it said it was -0.0344477 when you plug in 1/5 into the derivative

Answer 3

but the computer says that's the wrong m

Answer 4

you would put 0 into the derivative since x=0

Answer 5

it's ok i already got the answer. m=-5 and b=0

Answer 6

thanks though