The company's Chief Financial Officer plots material costs on a graph, where the x-axis represents the number of pounds of material bought,
and the y-axis represents the total cost of the purchase, in dollars. Given
that the cost per pound is proportional, complete the table to indicate
which ordered pairs could represent material purchases of concrete,
steel, and/or wood.

step-by-step explanation:

let

we know that

the y-intercept is the y-coordinate of the point when the value of x is equal to zero

so

the y-coordinate of the point a is the y-intercept

the answer part a) is

the value of y-intercept is

part b) find the slope m

we know that

the value of the slope is equal to

substitute the values

therefore

the answer part b) is

the value of the slope is equal to

the general answer is

the slope is

the value of y-intercept is

d. it is a convex pentagon because it has five sides and none of the sides would extend into the inside of the polygon.

step-by-step explanation: