Question

A line passes through the points (7, 10) and (7, 20). Which statement is true about the line? It has a slope of zero because in the formula is zero, and the numerator of a fraction cannot be zero. It has a slope of zero because in the formula is zero, and the denominator of a fraction cannot be zero. It has no slope because in the formula is zero, and the numerator of a fraction cannot be zero. It has no slope because in the formula is zero, and the denominator of a fraction cannot be zero.

Answer 1

if we use the formula Y2-Y1

X2-X1

then you will see that we r getting 0 in the denominator(and this is undefined in mathematics).

crudely we can say that slope is infinity. i.e. tan() is infinity. and this happens when angle is 90°.

hence angle between the lines is 90°

Answer 2

Answer:

It has no slope because x 2 minus x 1 in the formula m = StartFraction y 2 minus y 1 Over x 2 minus x 1 EndFraction is zero, and the numerator of a fraction cannot be zero.