On which of the following lines does the point (7, 1) lie? a.) y= 5x + 4 b.) y= -x + 8 c.) y= x- 10 d.) y= -4x + 3

For this case what we should do is evaluate the corresponding linear function with the following values:
 
 We must verify that equality is met.
 For the following function we have:
 
 Substituting values:
 
 Rewriting:
 
 Therefore, the point (7,1) is on the line.
 
 B.) y = -x + 8