exam Maths Puzzle Numerical Ability

Find the corresponding y values for x = -4, -3, -2, -1, 0, 1, 2 if .


x y
- 4
- 3
- 2
- 1
0
1
2

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exam Other Question
graph the equation.
y = 4x + 1 How large do you need to make x so that e^(-x/9) that is less than 0.1?


I tried inputting values for x and I came up with 21 as the value for x.