exam Maths Puzzle Numerical Ability

which equation of the line has a slope of 5 and passes through point (2,1)?

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exam Other Question

for the equation x-sqrtx=0 perform the following. Solve for all values of x that satisfies the equation. Then, once graphed how does the graph relate to the question asked? Could someone help me graph the following problem?
Can you show me the graph because I have to send it through the computer and need help.

Graph f(x) = 3x + 2

Thank you so much,
Lyn