The pollution level in the centre of a city at 6 am is 30 ppm (parts per million) and it grows in a linear fashion by 25 ppm (parts per million) every hour. If  y is pollution and t is the time elapsed after 6 am, then determine the function that relates y  with t .

A car rental charge is 100 dollars per day plus 0.30 dollars per miles traveled. Determine the function of the line that represents the daily cost by the number of miles traveled.

For such questions, we should know about the concept of function.

Evaluate the function 

For such questions, we should know the concept of the function.

Identify the function that is linear.

For such questions, we should know the concept of linear functions.

Ramona’s garage charges the following labor rates. All the customers are charged for at least 0.5 hr.

Write the linear function for the data in the table.

A linear function forms a straight line in a graph. It is usually a polynomial function with a degree of 1 or 0, and the equation f(x) = mx + b, where b and m are real numbers. Isn't it similar to the slope-intercept form of a line, which is written as y = mx + b? Yes, because a linear function represents a line.
¶Examples from daily life
1. To print logos on T-shirts, a t-shirt company charges a one-time charge of $50 and $7 per T-shirt. As a result, the total cost is given as a linear function f(x) = 7x + 50, where 'x' is the total number of t-shirts.
2. In linear programming problems, linear functions represent an objective function to minimize costs or maximize profits.
¶
¶

A copy shop can produce a course reader at a cost of $25 per copy. The monthly fixed costs are $10,000. Determine the total monthly cost as a function of the number of copies produced.

A chemical plant was found to be discharging toxic waste into a waterway. The state in which the chemical plant was located fined the company $125,000 plus $1,000 per day for each day on which the company continued to violate water pollution regulation. Express the total fine as a function of the number of days in which the company remains in non-compliance.

For such questions, we should know the concept of function.

When digging into the earth, the temperature rises according to the following linear function t = 15 + 0.01h,t,h is the depth in meters. Calculate what will be the temperature at 100 m depth?

For such questions, we should know the concept of function.

For the function 

Find the value of f (-1) for the function 

For such questions, we should know the concept of the function.

For the set of ordered pair shown, identify the domain.
{(-5,0); (-2,4); (-1,-3); (2,4); (4,-1)}

For the function , find the value of  

For the function 

For such questions, we should know the concept of the function.

For a given function , find the value of 

For such questions, we should know the concept of the function.

Find the value of f (3) for the function 

For such questions, we should know the concept of functions.

For the set of ordered pair shown, identify the range. {(-5,0); (-2,4); (-1,-3); (2,4); (4,-1)}