Here is a function: y = 10x + 30 a Construct a table of values with x going from 0 to 6.

b Use your table of values to draw a graph of y = 10x + 30 c Describe a situation that the function y = 10x + 30 could represent.

i Explain what the variables x and y and the numbers 10 and 30 represent.

ii Explain how the numbers 10 and 30 are linked to the graph.

d Look at a partner’s answer to this question.

Is their explanation clear?