yme Repair COSTS 400 320 240 Engine Repair Costs (dollars) 160 80 0 10 2 4 6 8 12 Number of Oil Changes Per Year The y-intercept of the estimated line of best fit is at (0, b). Enter the approximate value of b in the first response box.

X+ y = k 2x + 3y = k + 1 the point of intersection of the lines has an x-coordinate of a.2k + 1 b.-2k + 1 c.2k - 1

Explain why the function is discontinuous at the given number a. (select all that apply.) f(x) = 1 x + 1 a = −1 f(−1) is undefined. lim x→−1+ f(x) and lim x→−1− f(x) exist, but are not equal. lim x→−1 f(x) does not exist. f(−1) and lim x→−1 f(x) exist, but are not equal. none of the above

Which function is odd check all that apply a. y=sin x b. y=csc x c. y=cot x d. y=sec x