Answer:
please see answers below
Explanation:
in y = 7x + 9, the slope is 7 (the value with x after it is the slope).
to find a parallel line, we must use this slope value. we can pick any reasonable number for the y-intercept (the 9 in our equation).
so a parallel line could be y = 7x + 6.
the slope of a perpendicular line is given by -1/slope
= -1/7.
again, we can pick our own y-intercept.
y = -(1/7)x - 4 is the equation of one line perpendicular to y = 7x + 9