Correct! lines that have undefined slopes are always parallel to the y-axis as the change in x is 0. A gradient is calculated by the change in y divided by the change in x and anything divided by 0 is referred to as undefined.

(calculation for a gradient)
Hope that helps sorry if its a bit confusing :)

AS we know COSINE =PERPENDICULAR /BASE
SO ACCORDING TO ABOVE IMAGE
PERPENDICULAR is 5 ft
AND BASE
is 8 ft
so now cosine A = 5/ 8
MEAN THE CIRRECT ANSWER IS (D)
HOPE IT HELPED YOU
It is a polynomial with degree 2, with leading coefficient 2 and constant term 2. It has no linear coefficient. Its graph is a parabola.
The scale factor as I understand it will just be 1 to 30, inches to miles.
however, in this case it seems to be suggesting a conversion to the same unit, say hmmm let's convert the miles to inches.