What is 15 × -6? Please show your work!

-90

Step-by-step explanation:

Lets leave out the positive and negative signs for now.

So we say 15 × 6=90

So lets deal with the postives and negatives.

When multiplying numbers with two different signs the answer is always negative thus the answer is -90.

HOPE IT HELPED

Problem 2

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Explanation:

When we have an interval [a,b], the average rate of change over this interval is given by the formula

You probably can notice that we have something that looks eerily similar to the slope formula. That's because average rates of change are basically the same as the slope of the straight line through the endpoints of the interval. The f(b)-f(a) is the change in y of f(x) outputs. The b-a down below is the change of x values when going from x = a to x = b.

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Let's evaluate the function at x = 1

f(x) = x^2+1

f(1) = 1^2+1

f(1) = 2

Repeat for x = 3

f(x) = x^2+1

f(3) = 3^2+1

f(3) = 10

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We have enough info to evaluate the original formula I mentioned earlier

The average rate of change on this interval is 4

This is the same as saying the slope of the line through (1,2) and (3,10) is m = 4

See the graph below.