This is a linear function. Let diameter (inches) be x, circumference (inches) be y, observe that the value of y/x is always 3.14. For example, 15.7/5=31.4/10=...=3.14. Therefore, this is not only a function (one to one correspondence from x to y), it's also a linear function that can be represented as y=3.14x.
Answer:
1.36+3+(32)(2)
=57
error is that 6 is the wrong answer
15 is the answer
if its estimate, its basically asking 30% of 50
34= 12+(8)2+(3)2
youre basically just plugging in the numbers to the letter they correspond
