Which represents a quadratic function?
f(x) = −8x3 − 16x2 − 4x
f (x) = x 2 + 2x − 5
f(x) = + 1
f(x) = 0x2 − 9x + 7
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B

Step-by-step explanation:

Okay! So before we do this, first we have to understand the function. The function is,

y = ax^2 + bx + c, where a does not equal to 0.

The answer is not A, since bx is bx^2 which is incorrect.

The answer isn't C, since there isn't an ax^2 or a bc.

The answer isn't D since there a can't be 0.

The only correct answer is B, for it has all the parts.

x^2 + 2x -5.

connie < felicia < stew

step-by-step explanation:

stew:

we need to find the slope

m = (y2-y1)/ (x2-x1)

    = (2650-795)/(10-3)

    = 1855/7

265 words per minute

connie:

we need to find the slope

m = (y2-y1)/ (x2-x1)

we have two points (0,0) and (4,800)

m = (800-0)/(4-0)

  m = 800/4

    200 words per minute

felicia:

260 words per minute

200< 260 < 265

connie < felicia < stew