Here is a function: y = 2x + 40 a Complete this table of values.

b Use the table of values to plot a graph of y = 2x + 40 c Where does the graph cross the y-axis?
d Which of these points are on the line?
P (15, 70) Q (50, 140) R (37, 114)
S (−20, 0) T (100, 240)
e Compare your answer to part d with a partner’s. Do you agree about which points are on the line? Who is correct?
8 Here is a function: y = 5x −15 a Complete these coordinates of points on the graph of y = 5x −15

b Where does the graph of y = 5x −15 cross the y-axis?
c Where does the graph of y = 5x −15 cross the x-axis?

x -10 0 10 20 y 30 40 100