Slope and rate of change

The rate of change for a line is the slope, the rise overrun, or the change in y over the change in x. The slope can be calculated from two points in a table or from the slope triangle in a graph. The slope is the parameter m in the slope=intercept form of a line: y=mx+b.

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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

a. the are of the rectangle is 18.25

b. 18.25 times two is 36.50

rae me : d