In city a, the temperature rises 4 degrees °f from 8 a. m. to 9 a. m. then the temperature drops 7 degrees °f from 9 a. m. to 10 a. m. in city b, the temperature drops 6 degrees °f from 8 a. m. to 9 a. m. then the temperature drops 2 degrees °f from 9 a. m. to 10 a. m. write an expression that represents the change in temperature from 8 a. m. to 10 a. m. for each city. simplify and interpret each sum. use pencil and paper. which city has the greater change in temperature?

The general expression for the change in temperature between 8am and 10am

where stands for change in the subscripted time interval.

For city A:

For city B:

In city A, there is an overall drop of 3 degrees (negative value). In city B, the temp drops 8 degrees.

Among A and B, city B has a greater change in temperature (8 vs. 3)

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

9 x 8 divided by (5-3)=36