Equation of a Straight Line

What does the 'm' represent in the equation y = mx + c?

• The constant term

• The gradient

• The x-coordinate

• The y-intercept

How can you determine the y-intercept from a graph?

• By finding where the line crosses the x-axis

• By finding where the line crosses the y-axis

• By calculating the slope

• By using the equation y = mx + c

If a line has a gradient of 1, what does this mean?

• The line is vertical

• The line rises one unit for every unit it runs

• The line is horizontal

• The line falls one unit for every unit it runs

What is the first step in using a table of values to plot a graph?

• Draw the axes

• Substitute x-values into the equation

• Identify the y-intercept

• Calculate the gradient

How can you quickly identify the correct graph from a table of values?

• By calculating the gradient

• By matching the plotted points

• By checking the y-intercept

• By drawing a line through the origin

What is the cover-up method used for?

• Finding the gradient

• Plotting points on a graph

• Solving equations in the form ax + by = c

• Identifying the y-intercept

When using the cover-up method, what do you do first?

• Cover up the y-term

• Cover up the x-term

• Solve for x

• Solve for y

What indicates a negative gradient on a graph?

• The line slopes upwards

• The line is horizontal

• The line slopes downwards

• The line is vertical

How do you calculate the gradient of a line going downhill?

• Negative run divided by rise

• Run divided by rise

• Rise divided by run

• Negative rise divided by run

What is the equation of a line with a gradient of -2 and a y-intercept of 5?

• y = -5x + 2

• y = 5x - 2

• y = -2x + 5

• y = 2x + 5