KingMathLinear functions
Work out the image of a number.
🔍 Step 1 · Understand
First, look at a worked example
The function f is defined by f(x) = 5x. Work out f(−1).
💡 The tip : Replace x with −1 in 5x.
🤔 Find the answer in your head, then open the solution.
👀 See the solution✅ The solution
Answer: -5
f(−1) = 5 × (−1) = −5.
🎯 Step 2 · Your turn!
10 questions. Take your time, and ask for a hint if you get stuck.