In a frequency distribution, the mid-value of a class is 12 and its width is 6. the lower
limit of the class is:
(a) 6 (b) 9 (c) 12 (d) 18

Heather is writing a quadratic function that represents a parabola that touches but does not cross the x-axis at x = -6. which function could heather be writing? fx) = x2 + 36x + 12 = x2 - 36x - 12 f(x) = -x + 12x + 36 f(x) = -x? - 12x - 36