Solve the problem. Write all linear equations in slope-intercept form.
-By reading a graph on defense spending in the country of Warpeas, you discover that in year 0 the country spent $144 million on defense and in year 8 spent $528 million. Write a linear function that
Relates y (in millions of dollars) to x.
A) $y = - 48 x - 144$
B) $y = 84 x + 144$
C) $y = 48 x + 144$
D) $y = \frac { 1 } { 3 } x + 144$

Question

Solve the problem. Write all linear equations in slope-intercept form.
-By reading a graph on defense spending in the country of Warpeas, you discover that in year 0 the country spent $144 million on defense and in year 8 spent $528 million. Write a linear function that
Relates y (in millions of dollars) to x. 
A) $y = - 48 x - 144$
B) $y = 84 x + 144$
C) $y = 48 x + 144$
D) $y = \frac { 1 } { 3 } x + 144$

Quizplus · Accepted Answer

The slope (m) is calculated as the change in spending over the change in years: $m = \frac{528 - 144}{8 - 0} = 48$. The y-intercept (b) is the initial spending, $144 million. Thus, the equation is $y = 48x + 144$.

Solve the Problem y=−48x−144y = - 48 x - 144y=−48x−144 B) y=84x+144y = 84 x + 144y=84x+144

Solve the Problem $y = - 48 x - 144$ B) $y = 84 x + 144$