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Which graph matches which description?

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Which graph matches which description?

There might be more than one description for a graph, select all that apply.

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a) A stone dropping from a cliff will be accelerating due to gravity, so the graph will show an increasing gradient.

\n

b) The call out charge occurs even if the time of the call out is zero, therefore this graph has an intersection on the y-axis at 60 and then increases linearly.

\n

c) £0 = \\$0, therefore this graph intersects the origin and then increases linearly.

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A stone is dropped from a cliff
x: time
y: height of the stone above the ground

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A phone contract allows 250MB inclusive and then charges £5 for each additional 50MB.
x: MB used
y: cost

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A plumber charges a call-out fee of £60 and then £25 per half hour.x: time
y: total charge

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A stone is dropped from a cliff
x: time
y: height of the stone above the ground

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