exam Maths Puzzle Numerical Ability

Every machine that inputs numbers and outputs numbers is a function
True
False

The machine that multiplies an integer by 7 and then subtracts 1/2 from the result is a funct

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exam Other Question

Each of the red curves is a transformation of the graph y = 0.5x, shown in black. Write an equation for each red curve. I have been able to solve most of the answers for this problem however i need to find the answer for "part d" Can someone help look at the answers I have found and then help assis