Question

Find the constant of proportionality and the unit rate for the data table. Then write an equaion to represent the relationship between the time (t) and

the distance (d).

Please explain.

Answer 1

`\frac{90}2=45`


`\frac{135}3=45`


`\frac{225}5=45`


`\frac{270}6=45`

The constant of proportionality is thus 45; the unit rate is 45 miles per hour.

The relationship between the time t (in hours) and the distance d (in miles) is thus
`d=45\cdot t`