IGCSE /Grade 8
Maths MCQ Based On Writing an equation in y mx c form from a graph
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IGCSE Grade 8 Maths Writing an equation in y mx c form from a graph
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Substitute values of x and find values of y Plot all the points on graph
The graph of a non-linear function is not a straight line.
Find the equation with the help of points shown in the graph.
1 ). Find the value of gradient using formula
2). Find value of y-intercept form by substituting values of x, y and m
3). Write values of m and y-intercept c in the general form y = mx + c
Use gradient
Find the slope and y-intercept with the help of points shown in the graph. Write the equation in y=mx+c form.
Rearrange the given equation to the general equation of the line y = mx + c Divide the coefficient of y on both sides.
Find the equation with the help of points shown in the graph.
In the graph only the coordinates (-2,-1) lies on the straight line.
Substitute values of x as 1,2,3 and find value of y Plot values on graph
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