4 years ago

HELP NEEDED MATHS PLEASE!!!

Mathematics

1 answer:

polet [3.4K]4 years ago

3 0

Answer:

f(3)= 3+1

gf(3) is attached.

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PolarNik [594]

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3 years ago

After 6 months, the total cost of Tanya’s gym membership was $200. After 8 months, the total cost was $260. Is this a proportion

ycow [4]

Answer:

Non-proportional; the rate of change is $30/month

Step-by-step explanation:

After 6 months, the total cost was $200.

After 8 months, the total cost was $260.

Find the rate of change using formula

$\dfrac{f(b)-f(a)}{b-a}$

Hence,

$\text{Rate of change}\\ \\=\dfrac{\$260-\$200}{8-6}\\ \\=\dfrac{\$60}{2}\\ \\=\$30\ \text{per month}$

At this rate, after 6 months Tanya paid

$\$30\cdot 6=\$180$

But after 6 months, the total cost of Tanya’s gym membership was $200.

It means the relationship passes through the point (0,20), not through the origin. Each proportional realtionship passes through the origin. Thus, this is not proportional relationship.

6 0

4 years ago