first you have to find the slope of the function by finding the derivative which with this function you have to do implictly then plugging in 1and whatever why value we get by plugging 1 into the original function

so

now group our dy/dx terms to the left and non dy\dx terms to the right

factor out dy/dx

now plug in your x and y values to get the slope and then use point slope form to get the linear equation for the tangent line