For all points on the y-axis of a coordinate grid, the x-coordinate is always?

Positive
Negative
Zero
Undefined

Given f(x) = 17-x^2what is the average rate of change in f(x) over the interval [1, 5]?

How many days was the temperature above 90 degrees?

Select the correct answer from the drop-down menu. subtracting 3xy^2 from 8xy^2 gives the same result as the expression. [tex]3xy ^{2} - 8xy ^{2} [/tex][tex] { - 7xy}^{2} - {2xy}^{2} [/tex][tex] {7xy}^{2} - {2xy}^{2} [/tex]