I need some help with derivative homework

[livid swan]

for the 1st, find dy/dx and set x=7, let the result be m, then
y = mx + c
plug in (7,0) to solve for c

for the 2nd one, try each option one by one (the 1st option is obviously wrong)

[verbal sail]

tried it and my first answer was wrong

the second answer was also wrong