In Which Quadrant is this true

Given:

To find:

The quadrant in which lie.

Solution:

Quadrant concept:

In Quadrant I, all trigonometric ratios are positive.

In Quadrant II, only and are positive.

In Quadrant III, only and are positive.

In Quadrant IV, only and are positive.

We have,

Here, is negative and is also negative. It is possible, if lies in the Quadrant IV.

Therefore, the correct option is D.

3.4 pizzas

step-by-step explanation:

given is a scatter plot showing number of pizzas sold during weeks for different issues of coupon

y represents number of pizzas sold and x number of coupons issued

y is marked verticaly and x horizontally

the trend line is given as

y =3.4x+43

this says that even when no coupon is issued pizzas sold will be 43

and rate of change of pizza sold for 1 unit of coupon = slope = 3.4

i.e. when x increases by 1 unit y increases by 3.4 units

hence for each additional coupon issued 3.4 pizzas more will be sold