hi, my question is: find and equation of the tangent to the following curve at the point where x = 0

first i differentiated so i could find the gradient:

then subbing x = 0 into the equation you get 5 for the gradient.

using x = 0 you can also see that from the original equation y = -2

then using the equation formula

i got

so the equation looks to me like it should be y = -2

the answer in the back gives

for the equation

can someone show me what i'm doing wrong please,

thankyou

ps what do you have to type into latex to get the 1's in

to appear small and at the bottom of the x and y if you know what i mean? like the same size as "to the power of" but at the bottom