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dimaraw [331]
3 years ago
8

For f(x)=5x+1. Find f(-4)

Mathematics
1 answer:
Luba_88 [7]3 years ago
4 0

Answer:

-19

Step-by-step explanation:

f(x)=5x+1

F(-4) - substitute -4 as the x

F(-4)=5(-4)+1

F(-4) = -20 + 1

f(-4) = -19

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Answer:

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Step-by-step explanation:

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<em>Slope-intercept form</em> of a linear equation:  \mathsf{y=mx+b}

(where m is the slope and b is the y-intercept)

From inspection of the graph, the y-intercept is at (0, -4)

Therefore, b = -4

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\mathsf{slope=\dfrac{y_2-y_1}{x_2-x_1}}

where:

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\implies \mathsf{slope=\dfrac{0-(-4)}{7-0}=\dfrac47}

Therefore, the equation of the line is:

\mathsf{y=\dfrac47x-4}

For an inequality, the dashed line means < or >  (whereas a solid line means ≤ or ≥)

As the shading is below the line, we need to use <

Therefore, the final inequality is:

\mathsf{y < \dfrac47x-4}

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