IGCSE Mathematics Core C3.5.1 Interpret and obtain the equation of a straight-line graph in the form Question Bank

• Interpret and obtain the equation of a straight-line graph in the form y = mx + c. Questions may: • use and request lines in the forms y = mx + c x = k • involve finding the equation when the graph is given • ask for the gradient or y-intercept of a graph from an equation, e.g. find the gradient and y-intercept of the graph with the equation y = 6x + 3. Candidates are expected to give equations of a line in a fully simplified form.