Question 3 of 6intermediate💡 UnderstandShort Answer3 marks
What do you understand by ‘parametric shift of a line’? How does a line shift when its (i) slope decreases, and (ii) its intercept increases?
(i)
Answer
When the slope decreases, the line swings downwards.
(ii)
Answer
When the intercept increases, the line shifts upwards.
Explanation
The textbook context explicitly states that a decline in the slope (like a decline in MPC) causes the line to 'swing downwards'. For the intercept, the text defines it as the value of Y when X is zero in the linear equation Y = a + bX. Therefore, if the intercept increases, the starting point of the line on the Y-axis moves higher, resulting in an upward shift of the line.