The question is in the picture below

A change in x of 2 from one row to the next gives a change in y of 6. For example, changing x from -3 to -1 gives a change in y from -8 to -2. Then the slope is

... slope = ∆y/∆x = 6/2 = 3 . . . . . the coefficient of x

Now, you can pick any row of the table to determine what the intercept value must be. For example, choosing x = 1, we have

... 4 = 3×1 + intercept

... 1 = intercept . . . . . . . subtract 3 from both sides of the equation

Now, you know your equation is

... y = 3x + 1

_____

Since this is a linear equation, the y-intercept at x=0 will be halfway betweeen the value of y at x=-1 and the value of y at x=1. That is (-2+4)/2 = 1, in agreement with our calculation above.

the best buy, is the 4- kilogram bag of lollipops for $18.40.

step-by-step explanation:

i found my answer by dividing the cost of each bag by their respective weights.

14.88 divided by 2 = 7.44

17.29 divided by 3 = 5.77

18.4 divided by 4 = 4.6

24.4 divided by 5 = 4.88

by this, i found that the 4 kilo bag is the best buy.