4-1 Graphing Equations In Slope-Intercept Form Worksheet

4-1 Graphing Equations In Slope-Intercept Form Worksheet - Cognero Page 5

ANSWER:

a. T = 157c + 218

4-1 Graphing Equations in Slope-Intercept Form

b. $5242

60. MAGAZINES A teen magazine began with a circulation of 500,000 in its first year. Since then, the circulation has

increased an average of 33,388 per year.

a. Write an equation that represents the circulation c after t years.

b. What does the slope represent?

c. What does the c-intercept represent?

d. If the magazine began in 1944, and this trend continues, in what year will the circulation reach 3,000,000?

ANSWER:

a. c = 33,388y + 500,000

b. t he increase in circulation each year

c. the circulation in the first year

d. 2019

63. REASONING Determine whether the equation of a vertical line can be written in slope-intercept form. Explain

your reasoning.

ANSWER:

No; because a vertical line has no slope, it cannot be written in slope-intercept form.

64. CHALLENGE Summarize the characteristics that the graphs y = 2x + 3, y = 4x + 3, y = −x + 3, and y = −10x + 3

have in common.

ANSWER:

Sample answer: All four graphs are lines that cross the y-axis at 3.

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