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Elina [12.6K]
3 years ago
13

Which equation relates y to the x for the values in the table?

Mathematics
2 answers:
dolphi86 [110]3 years ago
7 0

d) y= 7/2x minus 3/4

hope it helps

AURORKA [14]3 years ago
5 0

Answer:

D

Step-by-step explanation:

First, let's determine what type of relationship we are dealing with by examining the table.

From x=1 to x=2, the y-value increased by 14/4 (25/4-11/4).

From x=2 to x=3, the y-value also<em> </em>increased by 14/4 (39/4-25/4)

And from x=3 to x=4, the y-value still increased by 14/4 (53/4-39/4).

Therefore, we can conclude that our table represents a linear relationship.

And since it increases by 14/4 or 7/2 for every x, this means that our slope is 7/2.

The only choice that represents a linear equation with a slope of 7/2 is D. So, the correct answer is D.

However, we can confirm our answer by writing our equation. We can use the point-slope form:

y-y_1=m(x-x_1)

Where m is the slope and (x₁, y₁) is a point.

Let's substitute 7/2 for m. We can pick any point, so I'm going to use (1, 11/4) for (x₁, y₁).

Substitute:

y-\frac{11}{4}=\frac{7}{2}(x-1)

Distribute:

y-\frac{11}{4}=\frac{7}{2}x-\frac{7}{2}

Add 11/4 to both sides. Note that 7/2 is the same as 14/4. So:

y=\frac{7}{2}x-\frac{14}{4}+\frac{11}{4}

Add:

y=\frac{7}{2}x-\frac{3}{4}

So, our answer is D.

And we're done!

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