Question

If f(1)=4 and f'(1)=2, find an equation of the tangent line at x=1

A. y=2x+2
B. y=2x-2
C. y=4x-7
D. y=4x-2
E. None of these

Answer 1

the slope at (1,4) is 2, so

y-4 = 2(x-1)