exam Maths Puzzle Numerical Ability

Which best describes the effect on the graph of f(x)=4x+8 if the y-intercept is changed to-3?

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exam Other Question

If;- x/7= y+4z/(2z-(x+r/2)) +(9t/6t) what is the value of x if p/r is 4.76785? Can you please help me solve this: Solve these equations for whatever variable they contain. Be sure to find all the values of the variable that make the equation true.
z^2 - 14z + 2 = 2 - 11z