Linear Functions and Functions

What is the y-intercept of the function f(x)=4 – 5x?

• -5

• 4

• -4

• 5

What is the slope of the line represented by the equation f(t)=2t−6?

• The slope is 2 and the y-intercept is −6.

• The slope is −6 and the y-intercept is 2.

• The slope is 2 and the y-intercept is 6.

What is the slope of the function?

• -3

• -2

• 3

• 4

What is the rate of change of the amount earned with respect to hours worked for this function?

• dollars per hours

• 3 dollars per hour

• 13 dollars per hour

The point-slope form of the equation of the line that passes through (–9, –2) and (1, 3) is y – 3 = 1/2(x – 1). What is the slope-intercept form of the equation for this line?

Which equation represents the line that passes through (–6, 7) and (–3, 6)?

Line CD passes through points C(3, –5) and D(6, 0). What is the equation of line CD in standard form?

• 5x + 3y = 18

• 5x – 3y = 30

• 5x – y = 30

Tickets to a basketball game can be ordered online for a set price per ticket plus a $5.50 service fee. The total cost in dollars for ordering 5 tickets is $108.00. Which linear function represents c, the total cost, when x tickets are ordered?

• c(x) = 5.50 + 20.50x

• c(x) = 5.50x + 20.50

• c(x) = 5.50 + 21.60x

A store offers packing and mailing services to customers. The cost of shipping a box is a combination of a flat packing fee of $5 and an amount based on the weight in pounds of the box, $2.25 per pound. Which equation represents the shipping cost as a function of x, the weight in pounds?

• f(x) = 5x + 2.25

• f(x) = 2.25x + 5

• f(x) = 2.25x − 5

Which equation represents the graphed function?

• –3x + 2 = y

• 2x – 3 = y