Mr Baffoe's farm is 20 km from his house . He uses his car to travel y km of the distance from his and walks
hours at the rate of 3km per hour to get to his farm. Find the value of y

Step-by-step explanation:

Given

Required

Determine the distance (y) covered by his car

First, we calculate the distance walked.

This is calculated as follows;

This means that he walked 4.5 km

The total distance can be expressed as a sum of distance covered while walking and distance covered by car.

i.e.

Make Car the subject

This gives

Hence, his car travelled 15.5km

the correct answer is b. negative exponential growth.

step-by-step explanation:

you can tell it's an exponential function because it decreases rapidly then levels out and never touches the x-axis.

it is negative because the y-axis decreases as the x-axis increases.

therefore it is a negative exponential growth graph.

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