All straight line graphs have an equation that can be written in the form 𝑦 equals 𝑚𝑥 add 𝑐, where 𝑚, the coefficient of the 𝑥 term, is the gradient or slope of the line. The constant, 𝑐, is ...

When two quantities are in direct proportion, as one increases the other does too. We can display this relationship in a graph. Two quantities that are in direct proportion will always produce a ...