For this question, we just need to plug in one of the given points in the graph for each options. Since we both have x and y values, we can cancel out the option D.
Using the points (1,52), we will find which of the remaining functions fits the given graph.
A.
y = 50x
52 = 50(1)
52 = 50
Since 52 is not equal to 50, A is not the correct function. Let's proceed to letter B.
y = 2x + 50
52 = 2(1) + 50
52 = 52
Since we got an equal value for both sides, option B is the right answer. To check, we can use another point on the graph, (3,56)
y = 2x + 50
56 = 2(3) + 50
56 = 6 + 50
56 = 56
We are now sure that option B is the right answer.