Write the slope-intercept form of the equation for the line passing through the given pair of points.
and 
A. y = 
x - 
B. y = - 
x
C. y = 
x + 
D. y = 
x
Answer: C
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Use a graphing calculator or computer to determine which of the given viewing windows displays the most appropriate graph of the specified function.f(x) = 7 + 7x - x3
A. [-10, 10] by [-10, 5] B. [-4, 5] by [-5, 5] C. [-4, 5] by [-15, 25] D. [-10, 20] by [-50, 50]
Complete the statement to illustrate the associative property.(7 + 6) + 4 = ___ + (6 + ___ )
A. 3 and 8 B. 7 and 4 C. 6 and 6 D. 4 and 7
Find the vertex and the intercepts. Then graph the function.f(x) = x2 + 2x - 3
A. Vertex (- 1, - 4);
x-int = (3, 0) and (1, 0);
y-int = (0, -3)
B. Vertex (- 1, - 4);
x-int = (-3, 0) and (1, 0);
y-int = (0, -3)
C. Vertex (1, - 4);
x-int = (-1, 0) and (3, 0);
y-int = (0, 3)
D. Vertex (1, - 4);
x-int = (-1, 0) and (3, 0);
y-int = (0, -3)
Solve the problem.A certain electronic air cleaner is capable of filtering x liters of air per second and the percentage of the contaminants that are removed from the air may be calculated by 
where 
Graph f in [0,85,5] by 
Then, use the intersection-of-graphs method to estimate the x-values where 70% to 95% of the pollutants are removed.
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A. 70% to 95% are removed when
about 22 to 30 liters of air are
filtered.
B. 70% to 95% are removed when
about 32 to 44 liters of air are
filtered.
C. 70% to 95% are removed when
about 25 to 35 liters of air are
filtered.
D. 70% to 95% are removed when
about 39 to 52 liters of air are
filtered.