2. explain how to determine whether a function is quadratic 3. write a quadratic function an explain how to graph it

2. A polynomial function is quadratic if it has a single variable and its highest degree is 2.

3. y = x²

This is about the simplest quadratic function. It can be graphed fairly easily by choosing points symmetrically about x=0, such as x = ±1, ±2, and so on. Plot the points, and draw a smooth curve through them.

(x, y) = (0, 0), (±1, 1), (±2, 4), (±3, 9)

easy math just plug in a and b

step-by-step explanation:

answer: city needs 2.4 inches of rainfall more to match the record of 40 inches.

step-by-step explanation:

since we have given that

total annual rainfall a city record = 40 inches

this year, total rainfall recorded = 37.6 inches

number of inches of rainfall   is needed to match the record of 40 inches is given by

hence, city needs 2.4 inches of rainfall more to match the record of 40 inches.