How do i find the domain and range on a graph

What is the slope of a line that is perpendicular to y = 3x + 1

(a) compute the maclaurin polynomial m2(x) for f(x) = cos x. (b) use the polynomial of part (a) to estimate cos π 12. (c) use a calculator to compute the error made using the estimate from part (b) for the value of cos π 12. remember that the error is defined to be the absolute value of the difference between the true value and the estimate.

X-intercept=-5 y-intercept=2 the equation of the line is