Answer:
12
Step-by-step explanation:
The point-slope equation of a line is ...
y = m(x -h) +k
for a line with slope m through point (h, k).
The line with slope -1 through point (4, 3) has the equation ...
y = (-1)(x -4) +3
y = -x +7
Then the value of y for x=-5 is ...
y = -(-5) +7 = 12
The value of r is 12.
