Keira goes shopping at a supermarket. The pie chart below shows information about the money she spent on petrol, clothes, food and other items. What fraction did she spend on petrol? She spent £30 on petrol. In total how much money did she spend?

mark other person brainliest

this is a direct variation proportion. y = kx

y is the total amount due, k is the constant of variation, and x is the number of texts sent.

plug in the 3.20 and the 16 to solve for the "k". this is the constant of proportionality. it is the value that will not change.

3.20 = k(16). solving you get $.20 per text.

the equation would then be y = .20x