That is false... coefficients in polynomials can lead in either positive or negative
for an expression or relation to be a function, it must not have any x-coordinate values repeated, let's check this one

Answer:Look at picture :)
Step-by-step explanation:
Y = X times 2 + 3 if that's what you're asking so y = 5x
Explanation:
2+3=5 so 5x bc x isn't a number
The circumference is found by the multiplying the diameter by pi so 3+3=6 so 6*3.14=18.84 ANSWER IS 18.84