Question

If you wanted to shift the graph of y = 2x + 5 up, which equation could you use?

A. y = 2x + 9
B. y = 8x + 5
C. y = 2x + 2
D. y = -2x + 5

Answer 1

If u add some value in the equation u will shift the graph in positive y-direction

Answer 2

but remember the value should be positive

Answer 3

let's analyze it one by one :

A. y = 2x + 9 --> if x negative, it shift down
B. y = 8x + 5
C. y = 2x + 2 --> if x negative, it shift down
D. y = -2x + 5 --> if x positive, it shift down

You know the answer ;)