Question

The graph below shows four straight lines, W, X, Y, and Z.

Which line is represented by the function f(x) = 3x + 5?
A: Line W
B: Line X
C: Line Y
D: Line Z

Answer 1

The y intercept (when x = 0) is at y=5 as y=3(0) + 5 allows y to equal 5. Therefore the answer is line x as it also goes through 5 when x = 0

Answer 2

The answer is X- the gradient is +5, and the line goes through +5 on the graph