Use the following lines to answer the question.

Question

line g: y=−45x+75
line h: y=54x+34
Is line g perpendicular to line h? Why or why not?

Yes, because the slopes of lines g and h are opposite and the y-intercepts are different.
Yes, because the slopes of lines g and h are opposite and reciprocal.
No, because the y-intercepts of lines g and h are different.
No, because the slopes of lines g and h have different signs.

Answer 1

I think the answer is the third answer

Answer 2

Perpendicular slopes are negative reciporcals (that means if you multiply then together the answer is -1)
for example 2 slopes that belong to perpendicular lines are -3 and 1/3
because they multiply to get -1 , thus they cross at 90 degrees and are thus perpendicular.
Check the slopes (they are what is connected to x)

Answer 3

Wait im confused . how do i multiply them to get -1

Answer 4

Multiply the numerators (the tops of the fractions) together, and then multiply the denominators (the bottoms of the fractions) together and then simplify.