Tony bought 9 cartons of ice cream and 4 cartons of yogurt each carton of ice cream cost $3 and each carton of yogurt cost $2 how much more money did tony spend on ice cream than on yogurt

i think c. but don't trust it.

step-by-step explanation:

options a,b,c are the right answer.

step-by-step explanation:

a linear parent function is always represented as y = x

if we write this function in the form of y=mx+c

⇒

or  

now if we plot a graph we will find these characteristics:

1) y intercept of the graph is zero so its a straight line passing through origin.

2) as we can see in both the forms of function written, values of x and y may be either positive or negative for the positive slope means points on the graph are either in first quadrant or in third one.

3) it's slope is one.