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For the given function, find (a) the equation of the secant line through the points where $x$ has the given values and (b) the equation of the tangent line when $x$ has the first value. $y=f(x)=x_{2}+x;x=?4,x=?1$ a. Which of the following formulas can be used to find the slope of the secant line? A. $?1?(?4)f(?1)?f(?4)?$ B. $f(?1)?f(?4)?1?(?4)?$ C. $?1+(?4)f(?1)+f(?4)?$ D. $f(?1)+f(?4)?1+(?4)?$ The equation of the secant line is b. The equation of the tangent line at $x=?4$ is

Since the given curve is y=x2+xAnd we have to find the equation of secant line which goes through the x=-4 and x=-1 Hence coordinates of the given poi