HiSET: Math : Functional relationship between two quantities
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Example Questions
Example Question #1 : Functional Relationship Between Two Quantities
A restaurant sets the prices of its dishes using the following function:
Price = (Cost of Ingredients) + (40% of the Cost of Ingredients) + 5
where all quantities are in U.S. Dollars.
If the cost of ingredients for a steak dish is $14, what will the restaurant set the price of the steak dish at?
$13.40
$14
$19.60
$19
$24.60
$24.60
The price of the dish is a function of a single variable, the cost of the ingredients. One way to conceptualize the problem is by thinking of it in function notation. Let 
"Price = (Cost of Ingredients) + (40% of the Cost of Ingredients) + 5"
into a regular equation with recognizable parts. Replace "Price" with 
Simplify by combining like terms (
The cost of ingredients for the steak dish is $14, so substitute 14 for 
All that's left is to compute the answer:
So, the steak dish will have a price of $24.60.
Example Question #1 : Functional Relationship Between Two Quantities
The plot shows the graphs of five different equations. Using shape and location, determine which graphed line corresponds to the equation 
Line A
Line D
Line B
Line E
Line C
Line B
The power of 
The equation is given in the slope-intercept form, 
In the given equation, the constant 
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