If Mrs. Wright had 90 students, how many pieces of candy would she need in order to give them each the same amount as she did for the 27 students above?

Explanation:

In the graph each divsion on the x-axis represents 3 students and each division of the y-axis represents 5 candies left in the bowl.

Every point of the graph, i.e. every ordered pair (x, y), represents the number of candies given to the corresponding number of students.

Some pairs are:

           ⇒ 45 - 40 = 5 candies were given every 3 students.

Since you might draw a line that passes through all the the points on the graph, the ratio of number of candies to number of students will be the same:

Thus, set a proportion:

Solving for x:

Therefore, Mrs Wright would need 150 pieces of candies in order to give the 90 students the same amount as she did for the 27 students.

gregory's graph is incorrect because it shows 2 inches of growth for each week when it should show 0.75 inches of growth each week.

answer: 42

use a calculator to find that 845/73 = 11.575

the whole part of the answer is 11. multiply this by 73 to get 11*73 = 803.

subtract that result from 845 to get 845 - 803 = 42