CIE iGCSE Maths E3.2 Drawing linear graphs Exam Style Practice Questions- Paper 2
Question
Find the gradient of the line joining the points (-2,7) and (3,1).
▶️ Answer/Explanation
Solution
Ans: \(-\frac{6}{5}\)
Step 1: Recall the gradient formula:
\[ m = \frac{y_2 – y_1}{x_2 – x_1} \]
Step 2: Identify the coordinates:
Point A: \((x_1, y_1) = (-2, 7)\)
Point B: \((x_2, y_2) = (3, 1)\)
Step 3: Substitute into the formula:
\[ m = \frac{1 – 7}{3 – (-2)} = \frac{-6}{5} \]
Interpretation:
- The negative gradient indicates the line slopes downward from left to right
- For every 5 units moved right, the line falls 6 units vertically