Answer: C
Explanation:
First, find the y-intercept of the graph -> when x = 0
In this case, y-intercept is +4. Hence answer is C immediately.
To double confirm the answer, find the gradient.
Gradient of graph is (4-0)/(0-(-2)) = 4/2 = 2 (any two fixed points on the graph can be obtained)
Hence, equation of graph is y = 2x+4 (form y = mx+c, where m is the gradient and c is the y-intercept of the graph)